Classifying and Measuring Angles

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 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 a straight angle?

Back

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

Front

What is the measure of an angle that is greater than 90 degrees but less than 180 degrees?

Back

Obtuse angle.

Front

What is the measure of an angle that is less than 90 degrees?

Back

Acute angle.

Front

What is the measure of a right angle?

Back

90 degrees.

Front

What is the measure of a straight angle?

Back

180 degrees.

Front

If an angle measures 155 degrees, what type of angle is it?

Back

Obtuse angle.

Front

If an angle measures 78 degrees, what type of angle is it?

Back

Acute angle.