Classifying Angles and Angle Relationships

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What is the sum of complementary angles?

Back

The sum of complementary angles is 90 degrees.

Front

What is the sum of supplementary angles?

Back

The sum of supplementary angles is 180 degrees.

Front

If one angle measures 63 degrees, what is its complementary angle?

Back

The complementary angle is 27 degrees.

Front

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

Back

The supplementary angle is 60 degrees.

Front

How do you classify an angle that measures 45 degrees?

Back

An angle that measures 45 degrees is classified as an acute angle.

Front

How do you classify an angle that measures 150 degrees?

Back

An angle that measures 150 degrees is classified as an obtuse angle.