Measuring Angles

Front

What is a protractor used for?

Back

A protractor is used to measure angles.

Front

What is the measure of an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is the measure of an obtuse angle?

Back

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

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What is the measure of a full rotation?

Back

A full rotation measures 360 degrees.

Front

How do you measure an angle using a protractor?

Back

Align the protractor's baseline with one side of the angle and read the measurement where the other side crosses the protractor.

Front

What type of angle is 21 degrees?

Back

21 degrees is an acute angle.

Front

What type of angle is 102 degrees?

Back

102 degrees is an obtuse angle.

Front

What type of angle is 180 degrees?

Back

180 degrees is a straight angle.