Scale Factor

Front

What is a scale factor?

Back

A scale factor is a number that describes how much a figure is enlarged or reduced in size when creating a scaled copy.

Front

If the scale factor is greater than 1, the copy is...

Back

larger.

Front

If the scale factor is less than 1, the copy is...

Back

smaller.

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape but different sizes, and their corresponding angles are equal.

Front

How do you find the missing side length in similar figures?

Back

Use the ratio of the corresponding sides and set up a proportion to solve for the missing length.

Front

What is the scale factor from a rectangle with dimensions 4x6 to a rectangle with dimensions 2x3?

Back

The scale factor is 1/2.

Front

If triangle ABC is scaled to triangle DEF with a scale factor of 3, what happens to the area?

Back

The area of triangle DEF will be 9 times larger than the area of triangle ABC.

Front

What is the relationship between the scale factor and the perimeter of similar figures?

Back

The perimeter of similar figures is proportional to the scale factor.

Front

If a rectangle's length is doubled and width is halved, what is the new scale factor?

Back

The scale factor is 1.

Front

How do you express a scale factor of 2/3 as a percentage?

Back

As a percentage, the scale factor of 2/3 is approximately 66.67%.