Scale Factors & Scale Copies Review.

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, a quantity. It is used to enlarge or reduce a figure.

Front

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

Back

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

Front

If a triangle has sides of 3 cm and is scaled by a factor of 2, what are the new side lengths?

Back

The new side lengths will be 6 cm.

Front

What does it mean for two figures to be scale copies?

Back

Two figures are scale copies if they have the same shape but different sizes, and their corresponding sides are proportional.

Front

If the scale factor is 3, what happens to the area of a shape?

Back

The area of the shape increases by a factor of 3², or 9.

Front

What is the scale factor if a rectangle's length is doubled and width remains the same?

Back

The scale factor is 2 for the length.

Front

If a scale factor is 1/2, what happens to the size of the figure?

Back

The figure is reduced to half its original size.

Front

What is the relationship between scale factors and ratios?

Back

Scale factors can be expressed as ratios of corresponding sides of similar figures.

Front

If a shape is enlarged by a scale factor of 5, how many times larger is its area compared to the original?

Back

The area is 5², or 25 times larger.

Front

What is the scale factor if a shape is reduced from 10 cm to 5 cm?

Back

The scale factor is 1/2.