Finding Scale Factor

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. In geometry, it is the ratio of the dimensions of a new figure to the dimensions of the original figure.

Front

If the scale factor is greater than one, what happens to the size of the new figure?

Back

The new figure will be larger.

Front

If the scale factor is less than one, what happens to the size of the new figure?

Back

The new figure will be smaller.

Front

What is the scale factor from a figure with dimensions 4 units to a figure with dimensions 8 units?

Back

The scale factor is 2.

Front

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

Back

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

Front

What is the scale factor from ΔDEF to ΔABC if the sides of ΔDEF are half the length of the sides of ΔABC?

Back

The scale factor is 1/2.

Front

If a triangle has a hypotenuse of 15 ft and is dilated by a scale factor of 2, what is the new hypotenuse?

Back

The new hypotenuse is 30 ft.

Front

What are the new dimensions of a rectangle with dimensions 5 ft by 2 ft when dilated by a scale factor of 3?

Back

The new dimensions are 15 ft by 6 ft.

Front

Back

Front

What is the scale factor if a rectangle's length increases from 4 ft to 10 ft?

Back

The scale factor is 2.5.