Question

the measures of two angles add to 90° if and only if the angles are complementary. if the measures of two angles do not add to 90°, then the angles are not complementary.

Explanation:

The first statement defines complementary angles as those whose measures sum to 90°. The second statement is the contra - positive of the first. In geometry, the concept of complementary angles is well - defined, and the logical relationship between the two statements holds true based on geometric definitions and logical implications.

Answer:

These statements accurately represent the definition and its contra - positive of complementary angles in geometry.