Types of angles

Front

What is an obtuse angle?

Back

An angle that is open more than a right angle but less than a straight angle. This angle measures between 90 and 180 degrees.

Front

What is an acute angle?

Back

An angle that is open less than a right angle and has a measure less than 90 degrees.

Front

What is a right angle?

Back

An angle that forms a square corner and has a measure of 90 degrees.

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

How many degrees are in a right angle?

Back

90 degrees.

Front

How many degrees are in an acute angle?

Back

Less than 90 degrees.

Front

How many degrees are in an obtuse angle?

Back

More than 90 degrees but less than 180 degrees.

Front

What type of angle is 120 degrees?

Back

Obtuse angle.

Front

What type of angle is 45 degrees?

Back

Acute angle.

Front

What type of angle is 90 degrees?

Back

Right angle.