Scale Factor & Using 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 determine how much larger or smaller a shape is compared to another shape.

Front

How do you find the scale factor between two shapes?

Back

To find the scale factor, divide the length of a side of the larger shape by the length of the corresponding side of the smaller shape.

Front

If the scale factor is 2, what does that mean?

Back

It means that the dimensions of the second shape are twice as large as the dimensions of the first shape.

Front

What is the scale factor from shape A (length 4) to shape B (length 8)?

Back

2

Front

If the scale factor is 1:3, what does this indicate about the sizes of the shapes?

Back

The first shape is one-third the size of the second shape.

Front

How do you calculate a missing side length using a scale factor?

Back

Multiply the known side length by the scale factor to find the missing side length.

Front

If a shape's side length is 5 and the scale factor is 4:5, what is the corresponding side length in the larger shape?

Back

4.

Front

What is the scale factor from a small rectangle (length 2) to a large rectangle (length 6)?

Back

3.

Front

If the scale factor is 1/2, how does the size of the smaller shape compare to the larger shape?

Back

The smaller shape is half the size of the larger shape.

Front

What is the scale factor from a large triangle (base 10) to a small triangle (base 5)?

Back

1/2.