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

What is the relationship between vertical angles?

Back

Vertical angles are angles that are opposite each other when two lines intersect. They are always equal in measure.

Front

If one angle measures 30 degrees, what is its complement?

Back

The complement of a 30-degree angle is 60 degrees.

Front

If one angle measures 120 degrees, what is its supplement?

Back

The supplement of a 120-degree angle is 60 degrees.

Front

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

Back

They are complementary because 45 + 45 = 90 degrees.

Front

What is the sum of the measures of two supplementary angles?

Back

The sum of the measures of two supplementary angles is 180 degrees.

Front

If two angles are complementary and one angle measures 40 degrees, what is the measure of the other angle?

Back

The other angle measures 50 degrees.

Front

Can two angles be both complementary and supplementary?

Back

No, two angles cannot be both complementary and supplementary at the same time.

Front

What is the measure of an angle that is supplementary to a 75-degree angle?

Back

The measure of the angle is 105 degrees.