Question

angles 1 and 2 form a right angle. which word describes their measures? linear congruent complementary supplementary

Explanation:

Two angles are complementary if the sum of their measures is 90 degrees. A right - angle measures 90 degrees. Since angles 1 and 2 form a right - angle, the sum of their measures is 90 degrees, so they are complementary.

Answer:

C. complementary