Question

The measure of an angle is 40.5°. What is the measure of its supplementary angle

Answer 1

Supplementary angles add to 180 degrees. So of the measure of the angle is x, the measure of its supplement is 2x. Angle = 60, supplement = 120

Explanation:

Answer 2

139.5º

Explanation:

The sum of supplementary angles is 180º

s + 40.5 = 180

Subtract 40.5 from both sides

s = 139.5º