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# Angles Formed by Intersecting Lines

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Author: Craig Nelson
##### Objective:

To explain angles that are formed by intersecting lines and how to solve for angle measures that are given algebraically.

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Tutorial

## Words To Know

• Angle - An angle is a figure formed by two lines that intersect at a point.

• Right Angle - An angle that has an angle measure of 90º.

• Angle Congruence - Angle congruence means that two angles have the same angle measure in degrees.

• Supplementary Angles - Two angles are supplementary if their sum adds up to 180º.

• Complementary Angles - Two angles are complementary if their sum adds up to 90º.

• Adjacent Angles - Adjacent angles are angles that share a leg.

• Linear Pair of Angles - A linear pair of angles is a set of angles that are adjacent and supplementary.

• Vertical Angles - Vertical angles are formed from two intersecting lines and are opposite one another.  They are congruent.

## Solving for Angle Measures With a Variable

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