Question

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

Explanation:

Angles that form a right angle (90°) sum to 90°. Complementary angles are defined as two angles whose sum is 90°. Linear pairs sum to 180°, congruent angles have equal measure (not implied here), and supplementary angles sum to 180°. So angles 1 and 2 are complementary.

Answer:

complementary (the option corresponding to "complementary")