Finding 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 figure is compared to another figure.

Front

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

Back

bigger than

Front

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

Back

smaller than

Front

What is the scale factor from a rectangle with a length of 10 cm to a rectangle with a length of 20 cm?

Back

2

Front

What is the scale factor from a triangle with a base of 4 cm to a triangle with a base of 2 cm?

Back

1/2

Front

If two shapes are similar, what can we say about their corresponding angles?

Back

Their corresponding angles are equal.

Front

If the scale factor from shape A to shape B is 3, what is the scale factor from shape B to shape A?

Back

1/3

Front

What is the scale factor from a square with a side length of 5 cm to a square with a side length of 10 cm?

Back

2

Front

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

Back

Divide the length of a side of the larger figure by the length of the corresponding side of the smaller figure.

Front

If the scale factor is 1/2, what does this mean for the dimensions of the new shape?

Back

The dimensions of the new shape are half the dimensions of the original shape.