Types of Angles

Front

What is an acute angle?

Back

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

Front

What is an obtuse angle?

Back

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

Front

What is a right angle?

Back

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

Front

What is a straight angle?

Back

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

Front

What is a reflex angle?

Back

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

Front

What is a revolution angle?

Back

A revolution angle is an angle that is exactly 360 degrees.

Front

How many degrees are in a right angle?

Back

A right angle has 90 degrees.

Front

How many degrees are in a straight angle?

Back

A straight angle has 180 degrees.

Front

How can you identify an acute angle?

Back

An acute angle can be identified as being smaller than a right angle (less than 90 degrees).

Front

How can you identify an obtuse angle?

Back

An obtuse angle can be identified as being larger than a right angle (more than 90 degrees but less than 180 degrees).