Using a Protractor

Front

What is a protractor?

Back

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

Front

What is the measure of a right angle?

Back

90 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 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

How do you use a protractor to measure an angle?

Back

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

Front

What is the measure of a full rotation?

Back

A full rotation measures 360 degrees.

Front

What is the difference between acute and obtuse angles?

Back

Acute angles are less than 90 degrees, while obtuse angles are more than 90 degrees but less than 180 degrees.

Front

What type of angle is 25 degrees?

Back

25 degrees is an acute angle.

Front

What type of angle is 145 degrees?

Back

145 degrees is an obtuse angle.