Complementary and Supplementary Angles

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

If angle A is 30°, what is the measure of its complementary angle?

Back

60° (90° - 30° = 60°).

Front

If angle B is 120°, what is the measure of its supplementary angle?

Back

60° (180° - 120° = 60°).

Front

Are two angles that measure 45° each complementary, supplementary, or neither?

Back

Complementary (45° + 45° = 90°).

Front

Are two angles that measure 90° and 90° complementary, supplementary, or neither?

Back

Neither (90° + 90° = 180°, but they are not less than 90°).

Front

What is the sum of complementary angles?

Back

90°.

Front

What is the sum of supplementary angles?

Back

180°.

Front

If angle C is 70°, what is the measure of its supplementary angle?

Back

110° (180° - 70° = 110°).

Front

If angle D is 50°, what is the measure of its complementary angle?

Back

40° (90° - 50° = 40°).