Perimeter with Scale Factor

If the scale factor to get from the small rectangle to the large rectangle is 4 and the perimeter of the small rectangle is 24 units. What is the perimeter of the larger rectangle?

• 112

• 24

• 96

• 32

Triangle PRQ is the pre-image. Triangle SUT is the image. What is the scale factor to get from the small triangle to the large triangle?

• 2

• 1.5

• .67

• 8/12

The original perimeter of a rectangle is 30cm, if we enlarge it by a scale factor of 4 what is the new perimeter?

• 120

• 480

• 1920

If a triangle is enlarged by a scale factor of 3/2, then which of the following statements about its perimeter will be true?

• The new perimeter will be 3/2 times the old perimeter.

• The new perimeter will be 1/2 of the old perimeter.

• The new perimeter will be 3 times the old perimeter

• The new perimeter will be 4 times the old perimeter

Using the image, with a scale factor of 2, find the perimeter of the new rectangle.

If I know the Perimeter of the smaller rectangle is 16. How do I know the perimeter of the larger rectangle without knowing side lengths.

• Multiply smaller Perimeter by SF

• Divide smaller Perimeter by SF

• Multiply smaller Perimeter by SFxSF

• Multiply smaller Perimeter by SFx2

What is the perimeter of the scaled copy?

• 35 in

• 10 in

• 70 in

• 490in

From Denver to Chicago = 3 in. If the scale is 1 in = 300 miles, find the actual distance.

• 300 miles

• 1000 miles

• 900 miles

• 600 miles

How is Figure F reduced to Figure B?

• Multiply each side by 1/2

• Multiply each side by 1/3

• Multiply each side by 1/4

• Multiply each side by 1/5

If the perimeter of a rectangle was 20in and now it is is 80in, what is the scale factor that was used?

• 4

• 2

• 40

• 20