Question

m∠a = 72°; m∠b = 18°
are the two angles complementary, supplementary, or neither?
select your answer from the drop - down menu.
choose...

Explanation:

Step1: Define complementary angles

Complementary angles sum to $90^\circ$.

Step2: Calculate sum of angles

$m\angle A + m\angle B = 72^\circ + 18^\circ = 90^\circ$

Answer:

Complementary