Unit 1: Proportional Relationships

Front

Ratio

Back

A relationship between two numbers, sometimes shown as a fraction.

Front

Unit Rate

Back

The relationship between two numbers, when one of the numbers is 1.

Front

Proportional Relationship

Back

When two sets of numbers are related by the same multiplier.

Front

Constant of Proportionality

Back

A number that is the multiplier connecting two sets of numbers.

Front

Scale Drawing

Back

A drawing that copies the original but is a different size.

Front

Scale Factor

Back

The ratio that relates a copy to the original.

Front

Radius

Back

A line from the center of a circle to the outside of the circle.

Front

Circumference

Back

The distance around the outside of a circle.

Front

Diameter

Back

A straight line that connects two places on a circle through the center.

Front

Pi

Back

The ratio of the circumference of a circle to its diameter, about 3.14.