Measuring Angles

Front

What is an angle?

Back

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

Front

What is the vertex of an angle?

Back

The vertex is the point where two lines or rays meet to form an angle.

Front

What are the different types of angles based on their measures?

Back

Angles can be classified as acute (less than 90°), right (exactly 90°), obtuse (greater than 90° but less than 180°), straight (exactly 180°), and reflex (greater than 180°).

Front

How do you measure an angle?

Back

An angle is measured in degrees using a protractor.

Front

What is a protractor?

Back

A protractor is a tool used to measure angles in degrees.

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

What is a reflex angle?

Back

A reflex angle measures more than 180 degrees but less than 360 degrees.