## Definition Of Supplementary Angles

Supplementary angles are two angles that add up to give a straight angle, 180°

### Example of Supplementary Angles

In the example shown, 125° and 55° add up to give 180°, so they are called supplementary angles.

A. 60°,120°
B. 180°, 180°
C. 45°, 45°
D. 90°, 90°