Measuring Angles

Front

What is an angle?

Back

An angle is formed by two rays (sides) that meet at a point called the vertex.

Front

What is a vertex?

Back

A vertex is the point where two or more lines meet, forming an angle.

Front

What type of angle measures less than 90 degrees?

Back

An acute angle.

Front

What type of angle measures exactly 90 degrees?

Back

A right angle.

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

An obtuse angle.

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

How do you measure an angle?

Back

An angle is measured in degrees using a protractor.

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What is the measure of an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is the measure of an obtuse angle?

Back

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