Classifying Angles

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

Classify an angle that measures 45 degrees.

Back

Acute angle.

Front

Classify an angle that measures 120 degrees.

Back

Obtuse angle.

Front

Classify an angle that measures 90 degrees.

Back

Right angle.

Front

Classify an angle that measures 180 degrees.

Back

Straight angle.