Angles

Front

What is an angle?

Back

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

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

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 measures exactly 180 degrees.

Front

How do you classify an angle that measures 78 degrees?

Back

It is classified as an acute angle.

Front

How do you classify an angle that measures 120 degrees?

Back

It is classified as an obtuse angle.

Front

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

Back

It forms a right angle.

Front

What type of angle is formed by the hands of a clock at 10:10?

Back

It forms an obtuse angle.

Front

What is the sum of angles in a triangle?

Back

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