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 the measurement of an angle?

Back

The measurement of an angle is the amount of rotation from one ray to the other, usually measured in degrees.

Front

What is a degree?

Back

A degree is a unit of measurement for angles. One full rotation is 360 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 right angle?

Back

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

Front

What is a straight angle?

Back

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

Front

How can you identify an acute angle?

Back

An acute angle can be identified as it appears sharp and is smaller than a right angle.

Front

How can you identify an obtuse angle?

Back

An obtuse angle can be identified as it appears wider than a right angle.