Scale Factor and Scale

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. It is used to determine how much larger or smaller a scale drawing is compared to the original object.

Front

If a scale drawing is 8 units wide and the original is 4 units wide, what is the scale factor?

Back

2:1

Front

What does a scale factor of less than 1 indicate?

Back

A scale factor of less than 1 indicates a reduction in size.

Front

What does a scale factor greater than 1 indicate?

Back

A scale factor greater than 1 indicates an enlargement in size.

Front

If the scale factor is 4/5, what type of transformation is this?

Back

Reduction

Front

If the scale factor is 2, what type of transformation is this?

Back

Enlargement

Front

What is the scale factor from shape ABCD to shape MNOP if the scale factor is 3/2?

Back

The scale factor is 3/2.

Front

What is the scale factor from shape MNOP to shape ABCD if the scale factor is 2/3?

Back

The scale factor is 2/3.

Front

How do you calculate the scale factor between two similar figures?

Back

Divide the length of a side of the scaled figure by the corresponding side of the original figure.

Front

What is the relationship between scale factor and area?

Back

The area of a shape scales by the square of the scale factor.