Protractor Angles

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 using a protractor?

Back

Align the baseline of the protractor with one side of the angle, then read the degree measurement where the other side intersects the protractor.

Tags

CCSS.4.MD.C.6

Front

What is the range of degrees that a protractor can measure?

Back

A protractor can measure angles from 0° to 180°.

Tags

CCSS.4.MD.C.6

Front

What is an acute angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is a right angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is a straight angle?

Back

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

Tags

CCSS.4.G.A.1

Front

How do you round an angle to the nearest 10 degrees?

Back

Look at the last digit of the angle measurement. If it's 5 or more, round up; if it's less than 5, round down.

Tags

CCSS.HSF.TF.A.1

Front

How do you round an angle to the nearest 5 degrees?

Back

Look at the last digit of the angle measurement. If it's 3 or more, round up; if it's less than 3, round down.

Tags

CCSS.HSF.TF.A.1

Front

What is the measure of a 50° angle rounded to the nearest 10 degrees?

Back

The measure is 50°.