Measuring Angles With a Protractor

Front

What is a protractor?

Back

A protractor is a tool used to measure angles in degrees.

Front

How do you measure an angle with a protractor?

Back

Place the midpoint of the protractor at the angle's vertex, align one side with the baseline, and read the degree measurement where the other side crosses the protractor.

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 a full angle?

Back

A full angle is an angle that measures exactly 360 degrees.

Front

If an angle measures 162°, how would you classify it?

Back

An angle measuring 162° is classified as an obtuse angle.

Front

What is the measure of a half turn?

Back

A half turn is 180 degrees.

Front

What is the measure of a quarter turn?

Back

A quarter turn is 90 degrees.