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 (90 - 30 = 60).

Front

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

Back

60 degrees (180 - 120 = 60).

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

Give an example of a pair of complementary angles.

Back

45° and 45°.

Front

Give an example of a pair of supplementary angles.

Back

100° and 80°.

Front

If two angles are complementary and one angle measures 25 degrees, what is the measure of the other angle?

Back

65 degrees (90 - 25 = 65).

Front

If two angles are supplementary and one angle measures 75 degrees, what is the measure of the other angle?

Back

105 degrees (180 - 75 = 105).