4.7C Measure Angles on Protractor

Front

What is a protractor?

Back

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

Front

How do you measure an angle with 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.

Front

What is the range of degrees on a protractor?

Back

A protractor typically measures angles from 0 degrees to 180 degrees.

Front

What does it mean to measure an angle to the nearest degree?

Back

It means rounding the angle measurement to the closest whole number.

Front

If an angle measures 82.3 degrees, what is it when rounded to the nearest degree?

Back

82 degrees.

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

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

Front

What is an obtuse angle?

Back

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

Front

What is a straight angle?

Back

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

Front

How can you tell if an angle is acute, right, obtuse, or straight?

Back

By measuring the angle with a protractor and comparing it to the definitions of each type.