Measuring Angles with A Protractor

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 right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

How do you measure an angle with a protractor?

Back

To measure an angle with a protractor, align the protractor's baseline with one side of the angle, then read the measurement where the other side crosses the protractor.

Front

What is the measurement of a right angle?

Back

The measurement of a right angle is 90 degrees.

Front

What is the measurement of a straight angle?

Back

The measurement of a straight angle is 180 degrees.

Front

What do parallel lines do?

Back

Parallel lines never intersect or cross each other.

Front

If an angle measures 86 degrees, what type of angle is it?

Back

It is an acute angle.

Front

What is the measure of an angle that is less than 90 degrees?

Back

It is an acute angle.