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 use a protractor to measure an angle?

Back

Align the baseline of the protractor with one side of the angle, then 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 the measure of a full rotation in degrees?

Back

A full rotation measures 360 degrees.

Front

If an angle measures 0 degrees, what type of angle is it?

Back

An angle that measures 0 degrees is called a zero angle.

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.

Front

What is the measure of a right angle in degrees?

Back

A right angle measures 90 degrees.