Measuring Angles (4.7C)

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 are the different types of angles based on their measures?

Back

1. Acute angle: less than 90 degrees. 2. Right angle: exactly 90 degrees. 3. Obtuse angle: more than 90 degrees but less than 180 degrees. 4. Straight angle: exactly 180 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

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

If an angle measures 0 degrees, what type of angle is it?

Back

An angle that measures 0 degrees is called a zero angle.