Measuring Angles with A Protractor

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 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 right angle?

Back

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

Front

What is a straight angle?

Back

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

Front

What are parallel lines?

Back

Parallel lines are lines that never meet and are always the same distance apart.

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Front

How do you measure an angle with a protractor?

Back

To measure an angle with a protractor, align the protractor's center point with the angle's vertex and read the measurement where one line of the angle crosses the protractor.

Front

What is the measurement of a full circle in degrees?

Back

The measurement of a full circle is 360 degrees.

Front

What is the measurement of a half circle in degrees?

Back

The measurement of a half circle is 180 degrees.

Front

If an angle measures 132 degrees, is it acute, obtuse, or straight?

Back

It is an obtuse angle.