Question

An angle measures 142° less than the measure of its supplementary angle. What is the measure of each angle?

Answer 1

19° and 161°

Explanation:

A - an angle

S - its suplementary angle

A = S - 142°

Suplementary angles add to 180° so:

A + S = 180°

S - 142° + S = 180°

2S = 322°

S = 161°

A = 161° - 142° = 19°