Question

(a) an angle measures 51°. what is the measure of its complement?
(b) an angle measures 59°. what is the measure of its supplement?
measure of the complement:
measure of the supplement:

Explanation:

Step1: Find the complement of 51°

Complementary angles add up to 90°. So, subtract 51° from 90°.
$90 - 51 = 39$

Step2: Find the supplement of 59°

Supplementary angles add up to 180°. So, subtract 59° from 180°.
$180 - 59 = 121$

Answer:

measure of the complement: $39^\circ$
measure of the supplement: $121^\circ$