Two angles are supplementary if their sum is 180 degrees.

two angles whose measures total 180o.

Two angles are supplementary if their sum totals 180°.

Two angles whose measures have the sum 180.

Any two angles whose measures have sum 180 degrees.

two angles the sum of which measures 180°.

Angles whose sum of their measures is 180. Each angle is called a supplement of the other.

Angles that Add up to 180 Degrees

two angles, the sum of which is exactly 180º.

Two angles whose measures add up to 180 degrees

Two angles whose measures total 180°.

two (adjacent) angles which form a straight angle; i.e., the sum of their angle measures is 180

Two angles whose sum is 180°.

Two angles whose measures sum to 180º.

A pair of angles are supplementary if their respective measures sum to 180 degrees.