Scale Drawings and Similar Figures

If the parallelogram were enlarged using a scale factor of 3, what is the perimeter of the enlarged parallelogram?

• 80 cm

• 120 cm

• 200 cm

• 240 cm

The diagram below shows two similar figures. Which statement is true?

The diagram below shows two similar rectangles. What is the length of PS in Rectangle PQRS?

• 15 ft

• 18 ft

• 20 ft

• 25 ft

Triangle ABC is similar to triangle RST, what is the length of ST?

• 3.5 cm

• 3.75 cm

• 5 cm

• 7.5 cm

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet

• 16 feet 

• 10 feet

• 4 feet

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet

• 16 feet 

• 10 feet

• 4 feet

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

• 2

• 3

Tell whether the two figures are similar. Explain your reasoning.

• Yes, similar because they are the same shape and side lengths are proportional.

• No, not similar because they are the same shape, but side lengths are not proportional.

• Yes, same shape

• No, different sizes

A room has an actual width of 20 feet and length of 25 feet.  How should the scale drawing look like if the scale used is 1 unit: 5 feet?

• A

• B

• C

• D

• F

• G

• H

• J