Complementary Angles

Posted in Terms Defined

When the sum of the measures of two angles is 90°, the angles are called complementary angles.

For examples the following pairs are complementary:

(a) 30° and 60°

(b) 45° and 45°

(c) 10° and 80°

 When two angles are complementary, each angle is said to be the complement of the other angle. The '10° angle' is complement of the '80° angle'.