Question

which angle is complementary to ∠6? ∠5 ∠4 ∠3 ∠1

Explanation:

Step1: Recall complementary - angle definition

Two angles are complementary if their sum is 90 degrees. In the given figure, we can see that ∠1 is a right - angle (marked with a square), and ∠5 + ∠6+∠1 forms a straight - line (180 degrees). Since ∠1 = 90 degrees, then ∠5+∠6=90 degrees.

Answer:

∠5