Scale Factor

A model of a house was built using the scale 5 in:25 ft. If a window in the model is 1.5 in. wide, how wide is the actual window?

• 90 ft

• 7.5 ft 

• 4.5 ft

• 45 in

A rectangle has the dimensions 4cm by 5cm. A scale factor of 3 is used to enlarge the rectangle. What is the new area?

• 20 cm²

• 60 cm²

• 180 cm²

• 100 cm²

A rectangle has the dimensions 2.2cm by 4.5cm. A scale factor of 4 is used to enlarge the rectangle. What is the new area?

• 39.6 cm²

• 8.8 cm²

• 9.9 cm²

• 158.4 cm²

What is the scale factor from triangle ABC to triangle DEF?

• 1/2

• 7/3

• 2/1

• 10/3

What is the scale factor of the dilation of ABC to XYZ?

• 2

• 3

What is the scale factor from ABCD to MNOP?

• 2/3

• 3/2

• 2

• 3

A ~ B. What is the scale factor of the dilation of A to B?

• 3

• 4

What is the scale factor from the large triangle to the small triangle?

• 1/2

• 2/3

• 3/4

• 2

Which figure is similar?

• A

• B

• C

• D

The diagram shows a rectangle that is 4 in by 7 in in measure.

Which is the measure of a rectangle that is similar to the rectangle above?

• 4 in x 17 in

• 24 in x 42 in

• 7 in x 10 in

• 5 in x 8 in