Measuring with a Protractor

Front

TRUE OR FALSE: When measuring an angle, you put the center of the protractor on the vertex of the angle.

Back

True

Front

TRUE OR FALSE: To find out the measurement of the angle, you first need to determine what type of angle it is.

Back

True

Front

What is the common endpoint that two rays share to form an angle?

Back

Vertex

Front

What is the measure of this angle? (Assume the angle is shown on a protractor) 5 degrees, 175 degrees, 180 degrees, 6 degrees?

Back

175 degrees

Front

In geometry, degrees measure ...?

Back

Angle of rotation

Front

What is a protractor used for?

Back

To measure angles in degrees.

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint called the vertex.

Front

What is the vertex of an angle?

Back

The point where two rays meet to form an angle.

Front

What are the two types of angles based on their measurement?

Back

Acute angles (less than 90 degrees) and obtuse angles (more than 90 degrees but less than 180 degrees).

Front

How do you read a protractor?

Back

Align the protractor with one ray of the angle and read the measurement where the other ray crosses the protractor.