Objective
To identify special angle pairs and use their relationships to find angle measures
In this lesson, you will learn how to describe different kinds of angle pairs.
Essential Understanding Special angle pairs can help you identify geometric relationships. You can use these angle pairs to find angle measures.
Definition | Example | |
---|---|---|
Adjacent angles are two coplanar angles with a common side, a common vertex, and no common interior points. |
|
|
Vertical angles are two angles whose sides are opposite rays. |
|
|
Complementary angles are two angles whose measures have a sum of 90. Each angle is called the complement of the other. |
|
|
Supplementary angles are two angles whose measures have a sum of 180. Each angle is called the supplement of the other. |
|