Measuring Angles with A Protractor

Front

What is a protractor used for?

Back

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

Front

What is the measurement of a straight angle?

Back

A straight angle measures 180 degrees.

Front

Define an acute angle.

Back

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

Front

Define an obtuse angle.

Back

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

Front

What is the measurement of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

How do you read a protractor?

Back

To read a protractor, align the baseline of the protractor with one side of the angle and read the measurement where the other side intersects the numbered scale.

Front

What is the sum of angles on a straight line?

Back

The sum of angles on a straight line is 180 degrees.

Front

What is the relationship between parallel lines and angles?

Back

Parallel lines do not intersect; therefore, they do not form angles with each other.

Front

What is the measure of a full rotation in degrees?

Back

A full rotation measures 360 degrees.

Front

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

Back

An angle is acute if it is less than 90 degrees, obtuse if it is between 90 and 180 degrees, and straight if it is exactly 180 degrees.