Question

which pair of angles is complementary?

Explanation:

Step1: Recall complementary - angle definition

Two angles are complementary if their sum is 90°.

Step2: Check each pair

For the first pair, we have two right - angles, and the sum of two right - angles is 180°. For the second pair, 56°+34° = 90°. For the third pair, 31°+69°=100°.

Answer:

The pair of angles 56° and 34° is complementary.