Question

Angles 1 and 2 form a right angle.

2 lines form a right angle. Another line extends between the 2 lines to form 2 angles. The top angle is labeled 1, and the bottom angle is labeled 2.
Which word describes their measures?

linear
congruent
complementary

Answer 1

Complementary — together they sum to 90°. They are not a linear pair (that would sum to 180°) and aren’t necessarily congruent (equal in measure).