# Let's find which

Let us understand what complementary and supplementary angles are.

Complementary angles: When the sum of the measures of two angles is 90°, such angles are called complementary angles. Each angle is called complement of the other.

Supplementary angles: When the sum of the measures of two angles is 180°, such angles are called supplementary angles. Each angle is called supplement of the other.

Take pair 10° and 170°.

10° + 170° = 180°

Thus, by definition 10° and 170° are supplementary angles.

Take pair 38° and 52°.

38° + 52° = 90°

Thus, by definition 38° and 52° are complementary angles.

Take pair 35° and 65°.

35° + 65° = 100°

Thus, by definition 35° and 65° are neither complementary nor supplementary angles.

Take pair 90° and 90°.

90° + 90° = 180°

Take pair 25° and 165°.

25° + 165° = 190°

Thus, by definition 25° and 165° are neither complementary nor supplementary angles.

Take pair 45° and 45°.

45° + 45° = 90°

Thus, by definition 45° and 45° are complementary angles.

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