Question

∠a and ∠b are complementary angles ∠a measures 59 degrees What is the measure of ∠b

Answer 1

Angle B would be 121 degrees

Answer 2

Definition: Complementary angles add up to 90 degrees (they form a right angle)

A+B = 90
59+B = 90 ..... replace angle A with 59
B+59 = 90
B+59-59 = 90-59 ..... subtract 59 from both sides
B+0 = 31
B = 31

The measure of angle B is 31 degrees