complementary angle
This is the name given to two angles which add up to 90°, namely a right angle.
For example, 30° and 60° are complementary angles, and also 85° and 5°.
This is the name given to two angles which add up to 90°, namely a right angle.
For example, 30° and 60° are complementary angles, and also 85° and 5°.