Measuring Angles

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 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 an acute angle?

Back

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

Front

What tool is used to measure angles?

Back

A protractor is used to measure angles.

Front

What is the measure of a complete angle?

Back

A complete angle measures exactly 360 degrees.

Front

How do you classify angles based on their measures?

Back

Angles can be classified as acute (less than 90°), right (90°), obtuse (between 90° and 180°), straight (180°), and reflex (between 180° and 360°).

Front

What is the relationship between complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What is the relationship between supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is a reflex angle?

Back

A reflex angle is an angle that measures more than 180 degrees but less than 360 degrees.