Question

Find the measure of an angle whose supplement measures eight times its measure

Answer 1

The supplement of an angle is basically 180° minus that angle. In other words, two supplementary angles together add up to 180°.

If you let
`x` be the angle, then
`x` plus an angle eight times its measure is equal to 180°. Thus,
`x + 8x = 180`, or
`9x = 180`. Therefore,
`x` = 20°.