Question

Jed used a protractor to draw an angle measuring 72°. He asked Mark to draw an angle that would be complementary to his angle. What should the measure of Mark's angle be?

A.
144°
B.
18°
C.
108°
D.
162°

Answer 1

B

Explanation:

Complementary angles are 2 angles that add up to 90 degrees.

If the first angle is 72 degrees, then subtract 90 - 72 to get the measure of the second angle.

90 - 72 = 18

= 18 degrees