Question

If the measure of an angle is 3a, what is the measure of its complement?

Answer 1

Complementary angles are two angles that add up to 90°.

For this, we need to know what the value of a is. If you have this value, plug it into this equation:

90 - 3a = measure of complementary angle

For example, if a = 20:

90 - 3(20) = x

90 - 60 = x

30° = measure of complementary angle