Measuring Angles

Front

What is an angle?

Back

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

Front

What is the vertex of an angle?

Back

The vertex is the point where the two rays of an angle meet.

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 measure an angle?

Back

Angles are measured in degrees using a protractor.

Front

What is a full rotation in degrees?

Back

A full rotation is 360 degrees.

Front

If an angle measures 67 degrees, what type of angle is it?

Back

It is an acute angle.

Front

If an angle measures 140 degrees, what type of angle is it?

Back

It is an obtuse angle.