Complementary and Supplementary Angles

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

If one angle measures 30 degrees, what is the measure of its complementary angle?

Back

60 degrees.

Front

If one angle measures 120 degrees, what is the measure of its supplementary angle?

Back

60 degrees.

Front

Are 45° and 45° complementary or supplementary?

Back

Supplementary, because they add up to 90 degrees.

Front

What is the sum of the measures of complementary angles?

Back

90 degrees.

Front

What is the sum of the measures of supplementary angles?

Back

180 degrees.

Front

If angle A is 70 degrees, what is the measure of angle B if they are complementary?

Back

20 degrees.

Front

If angle C is 110 degrees, what is the measure of angle D if they are supplementary?

Back

70 degrees.

Front

Which pair of angles is complementary: 30° and 60°, 45° and 45°, 80° and 10°?

Back

80° and 10°.