Protractors with Misaligned Angles

Front

What is a protractor?

Back

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

Front

How do you read a protractor?

Back

To read a protractor, align the baseline of the angle with the 0° line of the protractor and find the measurement where the other side of the angle intersects the numbered scale.

Front

What is the angle measurement of a right angle?

Back

A right angle measures 90°.

Front

What is the angle measurement of a straight angle?

Back

A straight angle measures 180°.

Front

What is an acute angle?

Back

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

Front

What is an obtuse angle?

Back

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

Front

What does it mean for angles to be complementary?

Back

Two angles are complementary if the sum of their measurements is 90°.

Front

What does it mean for angles to be supplementary?

Back

Two angles are supplementary if the sum of their measurements is 180°.

Front

How can you identify a 30° angle on a protractor?

Back

A 30° angle is found by locating the 30° mark on the protractor's scale.

Front

What is the measurement of angle L DCB if it is given as 100°?

Back

Angle L DCB measures 100°.