Vertical Angles
Lesson Objective
In this lesson, we will learn about vertical angles.
About This Lesson
In this lesson, we will:
 What are vertical angles.
 See some examples on identifying them.
The study tips below will give you a short summary on this.
The math video below will explain in depth about this. Furthermore, it will show some examples so that you can understand this lesson better.
Study Tips
Tip #1
There are several properties that we must identify to see whether two angles are vertical angles. These conditions are shown in the picture below:
The math video below will explain more...
Math Video
Lesson Video
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Vertical Angles from MathExpression.com on Vimeo.

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00:00:04.110
In this lesson, we will learn about vert. angles.
00:00:10.210
When these two lines intersect, we will get a pair of nonadjacent angles.
00:00:17.210
Now, if we observe carefully, we can see that these two angles are congruent angles.
00:00:24.120
This means that, these two angles are the same.
00:00:29.050
Therefore, this angle will be 50 degrees.
00:00:34.120
Now, there is another pair of vert. angles.
00:00:39.130
Since this angle is 130 degrees, this angle must also be, 130 degrees.
00:00:47.120
Alright, when we rotate this line, take note of the vert. angles.
00:00:58.200
Let's look at some examples.
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Are these vert. angles?
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Yes! It is. Next example, this angle is 150 degrees. Find x.
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Now, we know that these angles are vert. angles.
00:01:23.100
Hence, these two angles must be congruent.
00:01:27.130
Therefore, x must be equals to, 150 degrees.
00:01:33.160
That is all for this lesson.
Practice Questions & More
Multiple Choice Questions (MCQ)
Now, let's try some MCQ questions to understand this lesson better.
You can start by going through the series of questions on vertical angles or pick your choice of question below.
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