Question

two angles that sum to 90° are called:
a. supplementary angles
b. opposite angles
c. complementary angles
d. adjacent angles

Explanation:

Complementary angles sum to \(90^{\circ}\). Supplementary angles sum to \(180^{\circ}\). Opposite angles are equal. Adjacent angles share a common side. So, the correct answer is complementary angles.

Answer:

C. Complementary angles