Classifying angles

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

How do you classify an angle that measures 45 degrees?

Back

It is classified as an acute angle.

Front

How do you classify an angle that measures 90 degrees?

Back

It is classified as a right angle.

Front

How do you classify an angle that measures 135 degrees?

Back

It is classified as an obtuse angle.

Front

How do you classify an angle that measures 180 degrees?

Back

It is classified as a straight angle.

Front

What type of angle is formed by the hands of a clock at 3:00?

Back

It forms a right angle.