1.5: Describe Angle Pair Relationships

The sum of two angles are…

Complementary Angles

�  If the sum of their measures is 90 degrees

�  Each angle is the complement of the other

Supplementary Angles

�  If the sum of their measures is 180 degrees

�  Each angle is the supplement of the other

Ex 1 : Identify

Ex 2: Find Measures

Ex 3

Example 4

Angle Pairs

Linear Pair

�  Noncommon sides are opposite rays

Vertical Angle

�  Sides form two pairs of opposite rays

Ex 5: Identify Angle Pairs

Ex 6: Find Angle Measures

Ex 7

Homework

�  P. 38 (3-30)