Question

What is the complementary angle of 57°?

What is the supplementary angle of 105°?

Answer 1

Complementary angles are two angles that add up to 90 degrees. Usually you are given one angle and are asked to find the complementary angle. For example: Find the complementary angle of 57 degrees. We need to subtract, 90 - 57= 33

, 30° and 150° are supplementary angles, because 30° + 150° = 180°. Clearly, 30° is the supplement of 150° and 150° is the supplement of 30°. Thus, the supplement of angle 105° = 180° - 105° = 75°.