Reading a Protractor

Front

What is a protractor?

Back

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

Tags

CCSS.4.MD.C.6

Front

How many degrees are in a right angle?

Back

A right angle measures 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Tags

CCSS.4.G.A.1

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Tags

CCSS.4.G.A.1

Front

How do you read a protractor?

Back

To read a protractor, align the baseline of the protractor with one side of the angle and read the measurement where the other side crosses the number scale.

Tags

CCSS.4.MD.C.6

Front

What is the measure of a 30° angle?

Back

A 30° angle is an acute angle.

Tags

CCSS.4.G.A.1

Front

What is the measure of a 60° angle?

Back

A 60° angle is an acute angle.

Tags

CCSS.4.G.A.1

Front

What is the measure of a 120° angle?

Back

A 120° angle is an obtuse angle.

Tags

CCSS.4.G.A.1

Front

What is the measure of a 180° angle?

Back

A 180° angle is a straight angle.

Tags

CCSS.4.G.A.1