Measuring with a Protractor

Front

What is a protractor used for?

Back

A protractor is used to measure angles in degrees.

Front

What is the common endpoint that two rays share to form an angle?

Back

Vertex.

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

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 crosses the protractor's scale.

Front

What is the measurement of an acute angle?

Back

An acute angle can measure between 0 and 90 degrees.

Front

What is the measurement of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is the measurement of an obtuse angle?

Back

An obtuse angle measures between 90 and 180 degrees.