Question

which angle is complementary to ∠4? 1 2 3 4 5 ∠2 ∠3 ∠5 ∠1

Explanation:

Step1: Recall complementary angles definition

Two angles are complementary if their sum is 90 degrees. In the given figure, we see that $\angle4+\angle5 = 90^{\circ}$ as indicated by the right - angle symbol.

Answer:

$\angle5$