## Consecutive Interior Angles – Definition, Theorem, Examples

Contiguous interior angles, also known as co-interior angles or same-side interior angles, are created on the inner sides of the transversal and are formed on the inner sides of the transversal. The intersection of any two parallel lines by a transversal results in the formation of several angles, such as alternative interior angles, matching angles, alternate exterior angles, and consecutive interior angles. On this page, we’ll go over some additional information concerning successive interior angles.

## What are Consecutive Interior Angles?

Continually overlapping interior angles are defined as a pair of non-adjacent interior angles that are on the same side of the transversal plane. The term ‘consecutive’ refers to objects that come immediately after one another. Interior angles that are adjacent to each other on the internal side of a transversal are referred to as consecutive interior angles. To identify the interior angles in the following figure, pay attention to the attributes of the sequential internal angles in the figure.

- Interior angles that are consecutive have distinct vertices
- They are sandwiched between two lines
- They are on the same side of the transversal
- They share a common side
- They are in the middle of two lines.

The parallel lines L 1 and L 2 are shown in the diagram above, and the transversal line T is shown. According to the definition of consecutive interior angles, the pairs of consecutive interior angles shown in the image are as follows:

## Angles Formed by a Transversal

When a transversal intersects a pair of parallel lines, several pairs of angles are generated in addition to the sequential internal angles that are formed by the transversal. analogous angles, alternate interior angles, and alternate exterior angles are the types of angles. Examine the following figure and make connections between it and the numerous pairs of angles and their attributes shown in the accompanying table. The attributes of all the many sorts of angles created when a transversal crosses two parallel lines are listed in the following table.

Types of Angles | Properties | Name of the Angles in the Figure |
---|---|---|

Corresponding Angles | Corresponding anglesare those angles that: |

- Have a variable number of vertices Lie on the same side of the transversal as the lines, but either above or below them. Are always on an equal footing

In the above figure, ∠1∠5, ∠2∠6, ∠4∠8, ∠3∠7 are all pairs of corresponding angles. | |

Alternate Interior Angles | Alternate interior anglesare those angles that: |

- Have a variable number of vertices Lie on the transverse on the opposite sides of the body
- Lie in the space between the two lines’ interiors

In the above figure,∠4∠6 and ∠3∠5 are pairs of alternate interior angles. | |

Alternate Exterior Angles | Alternate exterior anglesare those angles that: |

- Have a variable number of vertices Lie on the transverse on the opposite sides of the body
- Are on the outside of the lines

In the above figure, ∠1∠7 and ∠2∠8 are pairs of alternate exterior angles. | |

Consecutive Interior Angles | Consecutive interior anglesare those angles that: |

- Have a variable number of vertices Place yourself between two lines
- On the same side of the transversal as one another

In the above figure, ∠4∠5 and ∠3∠6 are pairs of consecutive interior angles. |

## Consecutive Interior Angle Theorem

The consecutive interior angle theorem determines the relationship between the successive interior angles in a given sequence. This is known as the ‘consecutive interior angle theorem,’ and it asserts that if a transversal meets two parallel lines, each pair of consecutive internal angles is supplementary, meaning that the sum of the consecutive interior angles equals 180°.

### Proof of Consecutive Interior Angle Theorem

The consecutive interior angle theorem is responsible for determining the relationship between successive interior angles. This is known as the ‘consecutive interior angle theorem,’ and it asserts that if a transversal meets two parallel lines, each pair of consecutive internal angles is supplementary, which means that the sum of the consecutive interior angles is 180°.

- 1 = 5 (corresponding angles with / lines) – (Equation 1)
- 1 + 4 = 180° (corresponding angles with / lines) (Linear pair of anglesare supplementary) – (see Equation 2)
- Substituting one for five in Equation (2) yields the result: 5 + 4 = 180°. Similarly, we may demonstrate that 3 + 6 = 180°
- 2 = 6 (matching angles with / lines) – (Equation 3)
- 2 + 3 = 180°
- 3 + 6 = 180°
- 2 + 3 = 180° (Linear pair of angles are supplementary) (Equation 4) Substituting 2 for 6 in Equation (4) results in the following result: 6 + 3 = 180°. As a result, it can be observed that 4 + 5 = 180°, and 3 + 6 = 180°.

As a result, it has been demonstrated that successive interior angles are supplementary angles.

## Converse of Consecutive Interior Angle Theorem

If a transversal intersects two lines so that a pair of successive interior angles are supplementary, then the two lines are parallel, according to the converse of the consecutive interior angle theorem. The proof of this theorem, as well as its converse, are presented in the following sections. Using the same illustration as before, In this case, the answer is 5 + 4 = 180° (Consecutive Interior Angles) (Equation 1) Due to the fact that 1 and 4 constitute a linear pair of angles, 1 + 4 = 180° – (Linear pair of angles are supplementary) – – – – – – – – – – – – – (Equation 2) We can express the left-hand side of the equations (1) and (2) as follows: 1 + 4 = 5 + 4 Because the right-hand sides of Equations 1 and 2 are equal, we can write them as follows: 1 + 4 = 5 + 4 The solution yields 1 = 5, which creates a matching pair on the parallel lines when we divide by the square root of 1.

As a result, in the above figure, one set of comparable angles is equal to the other, which can only occur if the two lines are parallel.

It is so possible to show the inverse of the consecutive interior angle theorem, which states that if a transversal intersects two lines in a such that a pair of successive internal angles are supplementary, then the two lines are parallel.

## Consecutive Interior Angles of a Parallelogram

Because we know that the opposing sides of a parallelogram are parallel, we may assume that the successive interior angles of a parallelogram are supplementary. Examine the following parallelogram, in which the interior angles A and B, B and C, C and D, and D and A are successive interior angles, and the interior angles A and B are consecutive interior angles. This may be explained in the following way:

- We can get 180° by taking the transverse of AB / CD and BC
- Likewise, we can get 180° by taking the transversal of AB / CD and AD
- And 180° by taking the transversal of AB / CD and AD. If we consider AD / BC as the transverse and CD as the transversal, then C + D = 180°. If we consider AD / BC and AB as the transversal, then A + B = 180°
- Otherwise, A + B = 180°.

Suggestions for Creating Consecutive Interior Angles Some key considerations when dealing with successive interior angles are listed below.

- The successive internal angles are non-adjacent and are located on the same side of the transversal as one another. If and only if the successive interior angles of two lines are supplementary, then the two lines are parallel.

The successive internal angles are non-adjacent and are on the same side of the transversal as the transversal itself. If and only if the successive interior angles of two lines are supplementary, then the two lines are parallel;

- Intersecting and non-intersecting lines, exterior angle theorem, pairs of angles, supplementary angles, exterior angle theorem, pairs of angles, supplementary angles, exterior angle theorem

## Consecutive Interior Angles Examples

- Example 1: Are the letters ‘l’ and’m’ on the following lines parallel? If the angles 125° and 60° in the preceding figure are supplementary, then it can be demonstrated that the lines ‘l’ and’m’ are parallel by using the following figure. However, 125° plus 60° equals 185°, indicating that 125° and 60° are not supplementary. The following lines are not parallel, according to the Consecutive Interior Angles Theorem
- As a result, the lines are not parallel. As an example, assuming lines 1 and 2 are parallel, the successive interior angles theorem may be used to calculate the value of angle ‘x,’ using the consecutive interior angles theorem. Solution: According to the diagram, 40° and x are successive internal angles, and the lines “Line 1” and “Line 2” are perpendicular to one another. According to the consecutive internal angles theorem, the angles x and 40° are supplementary to one another. x plus 40 degrees equals 180 degrees. x = 180° minus 40° Because of this, x = 140°
- In Example 3, if a transversal cuts two parallel lines at the intersection, and a pair of successive interior angles measure (2x + 4)° and (12x + 8)°, respectively, calculate the value of x as well as the values of both consecutive interior angles. Due to the fact that both of the supplied lines are parallel, and since (2x + 4)° and (12x + 8)° are successive interior angles, the solution is These angles are additional in accordance with the consecutive interior angle theorem. As a result, (2x + 4) plus (12x + 8) equals 180°. 14x + 12 = 180 degrees The number 14x equals 180 degrees minus 12 degrees. 14x = 168x = 12° 14x = 168x = 12° To obtain the values of the subsequent interior angles, we must first substract the value of x from the original value of x. 2x + 4 = 2(12) + 4 = 28°12x + 8 = 12(12) + 8 = 152°2x + 4 = 2(12) + 4 = 28°12x + 8 = 12(12) + 8 = 152°

Consider the following example. Are the letters l’ and m’ on the same line? If the angles 125° and 60° in the provided diagram are supplementary, then it may be demonstrated that the lines ‘l’ and’m’ are parallel by using the given figure as evidence. On the other hand, 125 degrees plus 60 degrees equals 185 degrees, which shows that 125 degrees and 60 degrees are NOT complementary. The following lines are NOT parallel, according to the Consecutive Interior Angles Theorem. Example 2: If lines 1 and 2 are parallel, you may use the consecutive interior angles theorem to calculate the value of the angle ‘x.’ Solution: According to the diagram, 40° and x are successive internal angles, and the lines “Line 1” and “Line 2” are perpendicular to each other.

- 120 degrees is equal to x plus 40 degrees.
- Due to the fact that both of the specified lines are parallel and that (2x + 4)° and (12x + 8)° are successive interior angles, the solution is Those angles are supplementary in accordance with the consecutive interior angle theorem.
- 182° is equal to 14x + 12.
- fourteen times one hundred and eighty degrees twelve times one hundred and eighty degrees To obtain the values of the sequential interior angles, we must first substract the value of x from the total value of x.

## FAQs on Consecutive Interior Angles

When a transversal travels over a pair of parallel lines or non-parallel lines, consecutive interior angles are generated. Their interior sides are produced at the place where the transversal joins the two crossed lines, and they are formed on the interior sides of the two crossed lines.

Alternatively, if the lines that the transversal crosses are parallel, then the pair of successive interior angles is considered supplementary.

### How to Identify Consecutive Interior Angles?

Intersections of parallel or nonparallel lines are generated when a transversal passes over them, producing successive interior angles. A transversal connects two parallel lines at the point where they overlap each other, forming a pair of interior sides for each crossed line. If the lines that the transversal crosses are parallel, then the pair of successive interior angles is said to be supplementary in this case.

- When any two straight lines are crossed by a transversal, the result is a series of consecutive interior angles. In this case, they each have two vertices
- They are located between two lines
- They are on either side of the transversal
- They have a common side
- And so on. If the successive angles are produced between two parallel lines that have been cut by a transversal, then they are supplementary
- Otherwise, they are supplementary.

### What is the Consecutive Interior Angles Theorem?

When a transversal crosses between two parallel lines, the consecutive interior angles theorem asserts that the transversal creates two sets of successive internal angles that are additional to one another. In other words, the sum of the consecutive interior angles created by two parallel lines crossed by a transversal line adds up to 180° when they are added together.

### What is the Converse of Consecutive Interior Angles Theorem?

In the opposite direction of the successive inner angles, we have According to the theorem, if a transversal intersects two lines in such a way that a pair of successive interior angles are supplementary, then the two lines are parallel to one another.

### Are Consecutive Interior Angles Always Supplementary?

No, consecutive interior angles are not necessarily supplementary to one another in the same plane. They are only useful when the transversal travels over two parallel lines at the same time. The formation of successive internal angles can also occur when a transversal travels between two non-parallel lines, however in this situation, the angles are not supplementary to one another.

### Are Consecutive Interior Angles Congruent?

Interior angles that follow one another are NOT congruent. If a transversal travels between two parallel lines, they are considered supplementary. This implies that they add up to 180° in all directions.

### What is Another Name for Consecutive Interior Angles?

Interior angles that are next to one another are referred to as ‘co-interior angles’ or’same-side interior angles’.

### What are the Other Angles Formed apart from Consecutive Interior Angles when a Transversal Passes Through Two Parallel Lines?

There are various types of angles created when a transversal crosses over two parallel lines in addition to consecutive interior angles, such as matching angles, alternate interior angles, and alternate exterior angles.

### What is the Difference Between Alternate Interior Angles and Consecutive Interior Angles?

The Alterate Interior Angles and Consecutive Interior Angles are two separate pairs of angles that are generated when two parallel lines are intersected by a transversal in the same direction. Despite the fact that they are placed between two crossing lines, alternate internal angles are on the opposite sides of the transversal line. Consecutive interior angles, on the other hand, are found on the inside of two lines that are on the same side of the transversal.

### How are Consecutive Interior Angles Related?

In the case of two parallel lines that are cut by a transversal, the Alterate Interior Angles and Consecutive Interior Angles are two separate pairings of angles. Despite the fact that they are placed between two crossing lines, alternate internal angles are on opposite sides of the transversal line. Consecutive interior angles, on the other hand, are found on the inside of two lines that are on the same side of a transversal.

### How to find Consecutive Interior Angles?

We are all familiar with the rule that if two parallel lines are intersected by a transversal and two successive interior angles are generated, then the interior angles are supplementary. This means that if we know one of the successive angles in a pair, we can simply determine the other angle by subtracting that angle from 180° in a simple manner. We may get the value of x in additional circumstances, such as when we have successive angles of (20+5)° and (24x-1)°, by using the following procedure.

In this case, 44x + 4 = 180, with the value of x equal to the number 4. As a result, the value of x may be replaced in the provided formulas, and the resulting successive angles will be (20 4) + 5 = 85° and (24 4) – 1 = 95°, respectively.

### Give an example of Consecutive Interior Angles in Real Life.

Concurrent interior angles can be observed in a variety of settings, such as a window grill with vertical and horizontal rods, in real life. It occurs when two horizontal rods (two parallel lines) are crossed by a vertical rod, resulting in a triangle (transversal).

### What do Consecutive Interior Angles Look Like?

Consecutive interior angles combine to produce a shape that looks something like the letter U, with the inner angles being the consecutive interior angles as the interior angles.

### How are Consecutive Interior Angles Related to Parallel Lines?

Interior angles created on the internal side of a transversal when it crosses two parallel lines are referred to as consecutive interior angles. It is necessary to note that when the transversal crosses across two parallel lines, the sequential interior angles that result are additional to one another.

## Consecutive Interior Angles: Definition & Theorem – Video & Lesson Transcript

As a result of this definition, you will encounter situations in which you must identify angles that are successive interior angles in a row. A certain angle will be given, and the question will ask if you can determine which other angle is the consecutive internal angle to that particular angle. The following image will be displayed, and you will be required to determine the consecutive internal angle to angle 3 in the image below, among other things. Your duty is to look at the photo and pick the other angle that corresponds to the angle that was given to you by the other party.

For example, if they were asking you to determine the consecutive interior angle to angle 2, you would look at the figure and observe that angle 2 is outside the two lines, which would be angle 2.

## The Theorem

Following our discussion of how to find successive interior angles, let’s go on to the theorem itself. The consecutive interior angles theorem asserts that if two lines are parallel, then the successive interior angles are additional to each other in the case of two parallel lines. Supplementary indicates that the sum of the two angles equals 180 degrees.

## √ Consecutive Interior Angles (Definition & Example)

Whenever two lines are crossed by another line (a transversal), Consecutive Interior Angles are the pairs of angles on one side of the transversal but within the two lines that are intersected. Example In this case, the interior angles are Consecutive Interior Angles: (candf) as well as (dande) A pair of successive interior angles is formed by the two angles in purple (d and e), while another pair of consecutive interior angles is formed by the two angles in red (c and f). Both pairs are sandwiched between the two lines and are on the same side of the transversal as one another.

- Identifying the Interior Angles of a Sequence What is the best way to tell if two angles are successive internal angles?
- As an illustration: Question 1.
- Choose another angle from the photo that corresponds to the one in question by looking at it from another angle.
- Question 2: What other angle is the consecutive inner angle to the angle b of an angleb?
- Because anglebitself is not a member of a pair, there is no successive internal angle from angleb to angleb.

When the two lines are parallel, each pair of Consecutive Interior Angles adds up to 180 o when the two lines are not parallel (supplementary). ProofGiven that:12, and3is a transversal expression Demonstrate that m c plus m f = m d plus m e = 180 o

Step | Statement | Reason |

1 | 1∥2, and3is a transversal | Given |

2 | ∠ cand ∠ bform a linear pair∠ dand ∠ aform a linear pair | Definition of linear pair |

3 | m ∠ c + m ∠ b = 180 om ∠ d + m ∠ a = 180 o | Supplement Postulate |

4 | ∠ b= ∠f∠a= ∠ e | Corresponding Angles Theorem |

5 | m ∠ c + m ∠ f = 180 om ∠ d + m ∠ e = 180 o | Substitution Property |

## Learn More

Alternate Interior Angles are a type of interior angle. Exterior Angles that are different from one another Elevation angles are a type of elevation angle. Depression How to Find the Right Angle in a Right Angled TriangleGeometry Index

## Consecutive Interior Angles: Definition & Examples

Continue reading to find out what consecutive internal angles are and how to distinguish them from other sorts of angles in this post. You will view various illustrations and even take a short quiz. But first, let’s go over what an angle is and how it differs from a perspective. In geometry, an angle is defined as the fraction of a plane that is between two rays that are connected by a vertex. It is recommended that you read this post from our blog: Introduction to Angles if you would want to learn more about the definition of an angle and the many sorts of angles.

## What are Consecutive Interior Angles?

I’m confident that the phrase “consecutive” comes to mind. Following one after the other in the same order, according to Merriam-Webster, is the definition of consecutive. In this situation, because we are talking about angles, we may say that a consecutive angle is one that occurs immediately after another angle. However, this definition might be improved by taking into consideration the fact that successive angles share a vertex as well as one of their sides. What exactly do we mean when we state that they share a vertex with one another?

A few photographs will assist us in better understanding what we’re looking at.

### Consecutive Angles

In this diagram, the alpha (orange) and beta angles (yellow) are sequential because they both have an angle and a side in common. Both angles are on the same side of the red axis.

### Non-consecutive Angles

In this case, the purple and orange angles are not consecutive since they share a vertex, but they do not have a side in common. With another way of putting it, these angles are not sequential since they only share the vertex and not a side with one another.

## Properties of Consecutive Interior Angles

- In this case, the purple and orange angles are not consecutive since they share a vertex, but do not have a side in common. With another way of putting it, these angles are not sequential since they only share the vertex and not a side with each other.

## When are Two Angles Consecutive?

When two angles have the same vertex and share a side, they are considered to be consecutive.

- If one of these criteria is not met, then the angles are not consecutive
- Otherwise, they are. If both qualities are met, then they are said to be consecutive

## Consecutive Interior Angles Examples

These are three examples of consecutive angles that are also supplementary angles due to the fact that they measure 180 degrees in length.

### Complementary

There are also successive angles that are complimentary because they measure 90 degrees in the same direction as one another.

## Video: Consecutive Angles Tutorial

How about we look at a real-world example of a consecutive angle in action? You may see a video explanation from Smartick about the connections between angles in the video player below. Eva and Zoe are decorating the wheels of their bicycles with a variety of colorful embellishments. It is possible to study the different connections between angles with the aid of this lesson, depending on their measurement and amplitude (complementary, supplementary, opposite, consecutive, and adjacent angles).

You must first register with Smartick in order to have access to our interactive lessons.

You’ll discover interactive lessons on angles, as well as many other topics in primary school mathematics, as well as tasks that are tailored to your child’s ability. Use the free trial time to your advantage.

## Show What You Have Learned With Various Exercises

Are you able to detect a series of angles in a row? Take a hard look at the viewpoints that are shared. You should consider whether or not the three photographs in this sequence are taken from successive angles.

### Solutions

Image 1: They are not in any particular order. Because they do not share a side, the angles in this example are not sequential, and as a result, they are opposing angles. Image 2: They are not in any particular order. Because they do not share a side, the angles in this example are not sequential, and as a result, they are opposing angles. Image 3: They are arranged in a sequence. In this situation, they are consecutive angles since they share an angle and have a side in common, making them consecutive angles.

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## Consecutive Interior Angles Theorem

The Consecutive Interior Angles are the angles that follow one another. Because a transversal line intersects two parallel lines, the two internal angles generated by this intersection are supplementary (that is, they add up to 180°), according to the theorem.

## The problem

AB||CD, Demonstrate that m5 + m4 = 180°, and that m3 + m6 = 180°. So, what is the best way to go about it? Previously, we learned that the two angles that are next to one other and that make a straight line are referred to as ” Supplementary angles,” and that their total is 180°. As a result, we will attempt to apply it here as well, as we must also demonstrate that the sum of two angles equals 180°. To demonstrate this, let’s use what we already know aboutang elements that are next to one other and which create a straight line to construct our demonstration.

## Proof

The following is an example of how to establish the Consecutive Interior Angles Theorem: In the case of (1)AB||CD/which is deduced from (2)1 5/from the axiom of parallel lines – similar angles (3) Congruent angles are defined by the formula m1 = m5 (4) the angle between the two points is equal to 180°(5) the angle between the two points is equal to 180° combining (3) and (4) and conducting algebraic substitution, replacingm1 with the corresponding m5 is equal to 180° The same evidence may be used to demonstrate the second pair of internal angles.

To establish the theorem, we’ll swap out the numbers 1 and 2 for numbers 3 and 6, then swap out the numbers 4 and 5 for numbers 3 and 4.

### About the Author

Ido Sarigi is a high-tech executive with a BSc in Computer Engineering from the University of California, Berkeley. His purpose is to assist you in developing a more effective method of approaching and solving geometry issues. You can get in touch with him at

## Consecutive Interior Angles Converse Theorem

During today’s lecture, we’ll go through how to prove the Consecutive Interior Angles Converse Theorem using a straightforward way. In theConsecutive Interior Angles Theorem, it is established that successive interior angles on the same side of a transversal line intersecting two parallel lines are supplementary angles (That is, their sum adds up to 180). In this section, we shall demonstrate the contrary of that theorem. As an example, we shall prove that if two lines are intersected by a transversal line with consecutive interior angles on the same side of the line are supplementary, then the two lines are parallel.

## Problem

Prove that AB||CD is true by multiplying M5 by m4.

## Strategy

This is an example of a converse theorem. A converseof a theorem is a statement that is created by swapping what is stated in a theorem with what is to be proven. This means that starting with what we did in the original theorem makes sense. Then we’ll see if we can figure out how to duplicate it. Previously, we relied on the fact that an alinear pair of angles is supplementary in order to prove the original statement. Let’s do the same thing here: As a linear pair, m1 + m4 = 180° is provided; as a linear pair, m5 + m4 = 180° is supplied; as a result, m5=m1, and the lines are parallel according to the reverse of the related angles theorem.

## Proof

(1) m5 plus m4 equals 180° / (1), (2), and (3), the transitive attribute of equality are inferred from the issue description. (2), (3), and (3), the linear pair of angles are additional (4) AB||CD /Theorem of the equivalent angles in reverse

### About the Author

Ido Sarigi is a high-tech executive with a BSc in Computer Engineering from the University of California, Berkeley. His purpose is to assist you in developing a more effective method of approaching and solving geometry issues. You can get in touch with him at

## Consecutive Interior Angles [Sample Questions]

At first glance, the term “consecutive interior angles” may appear to be a difficult concept to grasp. If you want to be more specific, consider splitting the term down word-by-word:

- ‘Sit’ next to one another (or ‘follow one another’) is what it means to be sequential. Anything that is interioris is something that is confined between other objects
- And anangle is the distance between two crossing lines that may be measured.

Sample Questions for Interior Angles in Consecutive Sequences In order to observe successive interior angles, we must first have two lines (which may be parallel or may ultimately meet) that are both crossed by a third, transversal line (which may be parallel or may eventually intersect). Take a look at this: We begin with the two lines ((overleftrightarrow ) and ((overleftrightarrow )). (overleftrightarrow ). Furthermore, the line (overleftrightarrow) is now crossing both of the initial lines (overleftrightarrow).

- An internal angle is defined as any angle that is between the lines (overleftrightarrow) and (overleftrightarrow) and that is greater than 90 degrees.
- Let’s have a look at the concept of consecutiveness: When working with successive interior angles, it’s vital to remember that the term “consecutive” refers to the way the angles are arranged in relation to the transversal line.
- We may draw the following conclusions as a result of all of this: the pairs (c) and (e) are successive interior angles, and the pairs (d) and (f) are also consecutive interior angles.
- Angles on any number of crossing lines are discussed in terms of additional angles, which must be understood before we can discuss them.
- This notion is referred to as thelinear pair postulate, and it is essential to comprehending theConsecutive Interior Angles Theorem.
- Proof: Let us demonstrate that (c) and (e) are supplementary to one another.

We know that a and e are congruent because of the corresponding angle postulate, which reads as “the measure of angle an equals the measure of angle e” (which translates as “the measure of angle an equals the measure of angle e”) In addition, we know that (mc+ma=180°) according to the linear pair postulate.

The term me can be substituted for the term ma as follows: (mc + me=180°). As a result, by definition, (c) and (e) are supplementary to one another. Here’s a more straightforward version of that proof:

(overleftrightarrowparallel overleftrightarrow ) | Given |

(∠a≅∠e) | By the corresponding angle postulate |

(m∠a=m∠e) | By the definition of congruence |

(∠a) and (∠c) are supplementary | By the linear pair postulate |

(m∠c+m∠a=180°) | By the definition of supplementary angles |

(m∠c+m∠e=180°) | By the property of substitution |

(∠e) and (∠c) are supplementary | By the definition of supplementary angles |

## Consecutive Interior Angles Sample Questions

Here are a few sample questions that go through consecutive interior angles in a sequential manner. The first question is: What are the names of the two angles that are successive internal angles? The letters (I) and (V) are represented by the letters (II) and (VIII) are represented by the letters (II) and (VIII). The letters (IV) and (V) are represented by the letters (I) and (VIII). The letters (IV) and (V) are represented by the letters (II) and (VIII). The letters (IV) and (V) are represented by the letters (II).

- (overleftrightarrow ).
- Question2:Is it true or false that the inner angles (z) and (w’) are successive interior angles?
- Interior angles (y) and (w’) are consecutive, and so are interior angles (z) and (x’).
- Answer:(75°+160°=235°≠180°).
- Whether the angles u and w are supplementary or successive internal angles is the subject of this question.
- According to the linear pair postulate, we may deduce that (mu=180°-81°=99°).
- As a result, (mu+mw=99°+81°=180°) is obtained.
- (∠2)(∠4)(∠2)(∠3)(∠1)(∠3)(∠1)(∠5) Answer: The internal angles ((2,3, and 4) are all interior angles, however the interior angles ((2 and 4) are successive interior angles.
- As a result, the angles (2) and (4) are supplementary angles as well.

## What does consecutive interior mean in geometry?

Asked in the following category: General The most recent update was made on June 28th, 2020. When two lines are crossed by another line (referred to as the Transversal), the pairs of angles on one side of the transversal but inside the two lines are referred to as Consecutive Interior Angles. When two lines are crossed by another line (referred to as the Transversal), the pairs of angles on one side of the transversal but inside the two lines are referred to as Consecutive Interior Angles. When two lines are crossed by another line (which is referred to as the Transversal), the pairs of angles that are on one side of the transversal but inside the two lines are referred to as ConsecutiveInterior Angles.

- The interior angles d and f are consecutive interior angles.
- Continually intersecting interior angles are the pairs of angles that are located between two lines and on either side of the line that connects the two lines.
- What is also important to understand is what consecutive interior means.
- Inside angles that are adjacent to each other on the same side of a transversal line that cuts over two parallel lines can be characterized as successive interiorangles formally.
- Likewise, see.

If the two lines are parallel, as a result of Euclid’s parallelism postulate, successive internal angles are supplementary, corresponding angles are equal, and alternate angles are equal if the two lines are parallel. There are no inconsistencies among the eight angles of a transversal.)

## Consecutive Interior Angles – Definition & Theorem with Examples

The angles created when a transversal line crosses two parallel or nonparallel lines are referred to as a pair of angles in mathematics. Consecutive interior angles, also known as co-interior angles, are located on one side of the transversal but on the inside of the two lines that form the transversal. Whenever the two lines are parallel, the sum of the interior angles of the two lines adds up to 180°. Consecutive Interior Angles are a type of interior angle that occurs repeatedly. The parallel lines AB and CD in the above diagram are crossed by the transversal line LM, as shown.

## Consecutive Interior Angles Theorem

The Theorem of Consecutive Interior Angles Prove the Theorem of Consecutive Interior Angles. In order to demonstrate that 3 + 5 = 180° and 4 + 6 = 180°, Proof: In light of the fact that the transversal WX intersects the two parallel lines denoted by ‘PQ’ and ‘RS,’ Now, 1 = 3 (Linear Pair) and 2 = 4 (Linear Pair) are equal (Linear Pair) Then 1 + 3 = 180°, and so on. (1) There is a formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized formalized (Supplementary Pair) In the same way, 2 + 4 Equals 180°.

(2) (Supplementary Pair) According to the Corresponding Angles Theorem, 1 = 5.

… ….

Similarly, by substituting (4) in (2), we have a result of 4 + 6 = 180°.

### Converse of Consecutive Interior Angles Theorem

Consecutive Interior Angles are the inverse of Consecutive Interior Angles. Theorem Identify and demonstrate the converse of Consecutive Interior Angles. Theorem In order to demonstrate:PQ RS Proof: Proof: As a result, the interior angles 3 + 5 = 180° and 4 + 6 = 180° are the two sets of sequential interior angles that are supplementary to each other. Now, the sum of 3 and 4 equals 180°. (Supplementary angles) As a result, 3 + 4 = 4 + 6 = 6 3 = 6 (Alternate interior angles) As a result, PQ = RS.

Solution: Specifically, if the two lines crossed by the transversal are parallel, the subsequent interior angles are supplementary.

Now, y = 50° is equal to (Alternate interior angle) In a same vein, z = x (Alternate interior angle) As a result, z = 130°.

Solution:According to the theorem of consecutive interior angles, the successive interior angles are supplementary to one another in the interior triangle. As a result, 2x – 12 Equals x +8. the product of 2x – x = 8 + 12 x = 20 As a result of this, the magnitude is 2x – 12 = 20 x 2 – 12 = 28.

## FAQs

Q1. Are the interior angles of consecutive interior angles congruent? Ans. Interior angles that are consecutive are not congruent with one another, but are supplementary to one another, which implies that they sum up to 180°.

## Whats a consecutive angle?

Mr. Stevie Nitzsche posed the question. 5 out of 5 stars (67 votes) Whenever two lines are intersected by a transversal, the pair of angles on one side of the transversal and between the two lines is referred to as the consecutive interior angles. Three of the angles in the illustration are successive internal angles, while the fifth is an outside angle.

## Do consecutive angles equal 180?

The “consecutive interior angle theorem” states that if a transversal intersects two parallel lines, each pair of consecutive interior angles is supplementary, that is, their sum is 180°. If a transversal intersects two parallel lines, the “consecutive interior angle theorem” states that each pair of consecutive interior angles is supplementary, that is, their sum is 180°.

## What does consecutive mean in geometry?

When transversals pass over two parallel lines, they produce two sets of angles that are equal to one another. The angles on one side of the transversal that would be supplementary (that is, adjacent to each other in this situation) are referred to as consecutive angles.

## What are consecutive angles in a shape?

A ray is formed by a series of consecutive angles in a polygon that share a segment as one of the sides and might be extended further to form another ray.

## Do consecutive angles equal each other?

Do consecutive angles have the same value as one another? No, the angles of two successive triangles are not identical to one another. The total of their angles is 180 degrees. A rectangle or when a transversal interacts with two parallel lines at 90 degrees is the only situation in which they may be said to be equivalent. There were 39 questions that were connected.

### Is consecutive angles are congruent?

The diagonals of the square cut through the angles of the square. Any pair of successive angles is referred to as a supplementary angle pair. The diagonals are congruent with one another.

### What is an example of a vertical angle?

When two lines cross, vertical angles are generated, which are known as pair angles. Vertical angles are frequently referred to as vertically opposing angles due to the fact that the angles are diametrically opposed to one another. Vertical angles are utilized in a variety of real-world situations, such as a railroad crossing sign, the word “X,” open scissors pliers, and so on.

### What are consecutive numbers?

Consecutive numbers are a set of numbers that are arranged in descending order from the smallest to the largest. When two successive integers are compared, the difference between them is always the same and follows a predictable pattern. For example, the first three natural numbers are 1, 2, and 3, which are the first three consecutive natural numbers.

### Are allied angles equal?

Angles that are allied (or co-interior) to one another are supplementary. Angles that are vertically opposed are always equal.

### Are consecutive angles in a parallelogram congruent?

A quadrilateral that is a parallelogram has successive angles that are supplementary to one another.

It is a parallelogram when the opposing sides of two adjacent quadrilaterals are congruent on both sides of the quadrilateral.

### How do you solve for interior angles?

Calculating the sum of interior angles may be done using the formula (n 2) 180, where n is the number of sides. In a regular polygon, all of the inside angles are the same size. In order to determine the amount of an interior angle, the following formula is used:interior angle of a polygon = sum of interior angles divided by the number of sides.

### When two lines intersect the vertically opposite angles are?

It is a theorem that the vertically opposing angles of a pair of crossing lines are equal.

### Why do co-interior angles add up to 180?

Alternate angles generated by parallel lines are all equal in length. The fact that the lines AB and CD are parallel indicates that the co-interior angles are not equal, but it also indicates that they are supplementary, that is, they are added together to form a total of 180°.

### What shape is opposite angles are congruent?

Parallelograms have the feature that their opposing angles are consistent with one another.

### Can you have a triangle with two right angles?

No, a triangle can never have two right angles at the same time. A triangle has exactly three sides, and the total of the internal angles adds up to 180° in a right triangle. For example, if a triangle contains two right angles, the third angle must be zero degrees, which indicates that the third side will overlap with the opposite side of the triangle.

### Are all angles congruent?

Those angles that are congruent with one another are those that are either exterior or interior angles, opposite angles, or comparable angles. The image above depicts two parallel lines with a transversal in between them.

### What is an angle at a point?

When measuring an angle, it is necessary to make reference to a circle whose center is located at the intersection of the rays. As a result, the total of all the angles at a point is always 360 degrees in length.

### When two lines are parallel alternate angles are?

An Alternative Interior Angle Theorem is a theorem that states how an interior angle can be formed by a pair of parallelograms. The Alternate Interior Angles Theorem says that when two parallel lines are sliced by a transversal, the alternate interior angles that arise are congruent with one another.

### What is the difference between alternate interior angles and consecutive interior angles?

Interior angles that are different from one another are congruent. Interior angles that are consecutive are supplementary. Contiguous interior angles are interior angles that are on the same side of the transversal line as the previous interior angle. In the case of non-parallel lines, alternate interior angles don’t have any special qualities that distinguish them from one another.