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# Vertical angles review

Review the basics of vertical angles, and try some practice problems.

## Vertical angles

Vertical angles are angles opposite each other where two lines cross.
For example, angle, A, X, D and angle, B, X, C are vertical angles in the following diagram:

### Practice set

Problem 1A
• Current
Are angle, A, P, D and angle, C, P, B vertical angles?
All segments that appear straight are straight.

Want to try more problems like this? Check out this exercise.

## Use vertical angles to find a missing angle measure

Let's look at an example.
What is the measure of angle x?
First, let's find the measure of the pink angle:
The pink and blue angles add up to 180, degrees because they are adjacent and form a straight line.
start color #ff00af, start text, p, i, n, k, space, a, n, g, l, e, end text, end color #ff00af, equals, 180, degrees, minus, start color #6495ed, 121, degrees, end color #6495ed, equals, start color #ff00af, 59, degrees, end color #ff00af
The pink and green angles also add up to 180, degrees because they are adjacent and form a straight line too.
start color #28ae7b, start text, g, r, e, e, n, space, a, n, g, l, e, end text, end color #28ae7b, equals, 180, degrees, minus, start color #ff00af, 59, degrees, end color #ff00af, equals, start color #28ae7b, 121, degrees, end color #28ae7b
The measure of angle x, equals, start color #28ae7b, 121, degrees, end color #28ae7b.

### Practice

Problem 2A
• Current
What is the measure of angle x?
degrees

Want to try more problems like this? Check out this exercise.

## Want to join the conversation?

• I'm not sure if you could see what i could see. but for the practice set like the last one #3... how is angle DYE not vertical with AZB?
• Because they do not share the same vertex
• Are vertical angles always equal? Because in some practices they weren't, and I didn't get why.
• Yes, vertical angles are always equal. Adjacent angles are not always equal though.
• When ever I try to do this Use vertical angles to find a missing angle measure, it always becomes the same answer to the angle I already know. How do you do this question?
• Indeed, verticle angles are always the same measure. The reason they wanted you to do the equation was so that you simply noticed this pattern and learned why this pattern always applies to vertical angles.
• how do you get the answer
• can u subtrackt it or like do angle - angle?