4.7C Measure Angles on Protractor

Front

What is a protractor used for?

Back

A protractor is 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 measures 180 degrees.

Front

How do you measure an angle with a protractor?

Back

Align the protractor's center point with the angle's vertex and read the measurement where one ray intersects the protractor.

Front

What is the total measure of angles in a triangle?

Back

The total measure of angles in a triangle is always 180 degrees.

Front

What is a full rotation in degrees?

Back

A full rotation is 360 degrees.

Front

If an angle measures 45 degrees, what type of angle is it?

Back

It is an acute angle.

Front

If an angle measures 120 degrees, what type of angle is it?

Back

It is an obtuse angle.