Measuring Angles with A Protractor

Front

What is a protractor?

Back

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

Front

What is the measurement 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 measurement of angle LRS if it is acute?

Back

Any measurement less than 90 degrees.

Front

What is the measurement of angle LRS if it is obtuse?

Back

Any measurement greater than 90 degrees but less than 180 degrees.

Front

What is the measurement of angle LRS if it is a right angle?

Back

90 degrees.

Front

If angle LRS measures 40 degrees, what type of angle is it?

Back

It is an acute angle.