Question

which angle is complementary to ∠1?

Explanation:

Step1: Recall definition of complementary angles

Complementary angles add up to 90°.

Step2: Analyze the figure

We see a right - angle formed by some of the angles at the intersection. If we assume the right - angle is composed of ∠1 and another angle. From the figure, ∠1 and ∠2 together form a right - angle.

Answer:

∠2