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 110 degrees, what is the measure of its supplementary angle?

Back

70 degrees.

Front

What is the relationship between complementary angles?

Back

The sum of their measures is 90 degrees.

Front

What is the relationship between supplementary angles?

Back

The sum of their measures is 180 degrees.

Front

Are two angles that measure 45 degrees complementary or supplementary?

Back

Complementary, because 45 + 45 = 90.

Front

Are two angles that measure 120 degrees and 60 degrees complementary or supplementary?

Back

Supplementary, because 120 + 60 = 180.

Front

If angle A is 25 degrees, what is the measure of angle B if they are complementary?

Back

Angle B is 65 degrees.

Front

If angle C is 150 degrees, what is the measure of angle D if they are supplementary?

Back

Angle D is 30 degrees.