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

What is the purpose of a protractor?

Back

The purpose of a protractor is to help in measuring and drawing angles accurately.

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 the angle measurement of a straight line?

Back

A straight line measures 180 degrees.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.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

How do you use a protractor to measure an angle?

Back

To measure an angle, align the baseline of the protractor with one side of the angle and read the measurement where the other side crosses the protractor.

Tags

CCSS.4.MD.C.6

Front

What is the difference between a full rotation and a half rotation?

Back

A full rotation is 360 degrees, while a half rotation is 180 degrees.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Front

What is a reflex angle?

Back

A reflex angle is an angle that measures more than 180 degrees but less than 360 degrees.

Tags

CCSS.4.G.A.1

Front

What is the smallest angle you can measure with a protractor?

Back

The smallest angle you can measure with a protractor is 0 degrees.

Tags

CCSS.4.MD.C.6