Angle Measurements

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 straight angle?

Back

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

Front

What is a right angle?

Back

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

Front

What is the sum of angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.

Front

How do you classify angles based on their measures?

Back

Angles can be classified as acute (<90°), right (=90°), obtuse (>90° and <180°), straight (=180°), reflex (>180° and <360°), and full (360°).

Front

What is the measure of a right angle in degrees?

Back

A right angle measures exactly 90 degrees.

Front

What is the measure of an obtuse angle in degrees?

Back

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

Front

What is the measure of an acute angle in degrees?

Back

An acute angle measures less than 90 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.