Measuring Angles with 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 do you measure an angle with a protractor?

Back

Place the midpoint of the protractor at the angle's vertex, align one side of the angle with the zero line, and read the measurement where the other side crosses the number scale.

Tags

CCSS.4.MD.C.6

Front

What is the measurement of 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

What is the measurement of a full rotation?

Back

A full rotation measures 360 degrees.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Front

If an angle measures 60 degrees, what type of angle is it?

Back

It is an acute angle.

Tags

CCSS.4.G.A.1

Front

If an angle measures 125 degrees, what type of angle is it?

Back

It is an obtuse angle.

Tags

CCSS.4.G.A.1

Front

What is the measurement of a 15-degree angle?

Back

It is an acute angle.

Tags

CCSS.4.G.A.1