Using a Protractor

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 right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Tags

CCSS.4.G.A.1

Front

What is the measure of a full rotation?

Back

A full rotation measures 360 degrees.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Front

How do you use a protractor?

Back

To use a protractor, align the baseline of the protractor with one side of the angle, then read the measurement where the other side intersects the protractor.

Tags

CCSS.4.MD.C.6

Front

What is the purpose of a protractor?

Back

A protractor is used to measure angles in degrees.

Tags

CCSS.4.MD.C.6

Front

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

Back

It is an acute angle.

Tags

CCSS.4.G.A.1

Front

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

Back

It is an obtuse angle.

Tags

CCSS.4.G.A.1

Front

What type of angle is 90 degrees?

Back

It is a right angle.

Tags

CCSS.4.G.A.1