Scale Factor

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. It is used to enlarge or reduce figures in a proportional way.

Front

If the scale factor is greater than one, what happens to the size of the figure?

Back

The new figure will be larger.

Front

If the scale factor is less than one, what happens to the size of the figure?

Back

The new figure will be smaller.

Front

What is the formula to find the area of a rectangle?

Back

Area = length × width.

Front

If a square has a side length of 25 feet, what is its area in square feet?

Back

625 square feet.

Front

In Amanda's scale drawing, if 2 inches = 5 feet, what is the scale factor?

Back

The scale factor is 1 inch = 2.5 feet.

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object or area that is proportionally reduced or enlarged.

Front

How do you determine if two figures are scale copies of each other?

Back

Two figures are scale copies if their corresponding sides are in proportion and their angles are equal.

Front

What is the scale used if 5 inches on a map represents 210 miles?

Back

The scale is 1 inch = 42 miles.

Front

If a rectangle's length is 10 inches and the scale factor is 2, what is the new length?

Back

The new length is 20 inches.