Proportional Scale Factor Area Perimeter

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

• 1/3

• 48

• 4

• 3

If I know the Area of the smaller rectangle is 12. How do I know the Area of the larger rectangle without knowing all side lengths.

• Multiply smaller Area by SF

• Divide smaller Area by SF

• Multiply smaller Area by SFxSF

• Multiply smaller Area by SFx2

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

If I know the Perimeter of the smaller rectangle is 16. And the scale factor is 2, what is the Perimeter of the larger rectangle?

• 16

• 8

• 64

• 32

Find the perimeter of the large triangle.

• 24

• 36

• 12

• 54

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

The dimensions of a rectangular photo are 3.5 in. x 5 in. The dimensions of the photo are enlarged by a scale factor of 2.5. What is the perimeter of the new photo?

• 17.7 in²

• 8.75 in. X 12.5 in.

• 42.5 in.

• There is not enough information.

Scale factor is the number that you _______ to calculate the new dimension.

• add

• subtract

• multiply

• divide

If the linear scale factor is 4, what is the area scale factor?

• 2

• 8

• 16

• 25

A scale factor of 1/2 is used to change the dimensions of a rectangle with a length of 7 centimeters and a width of 5 centimeters. What is the perimeter of the resulting rectangle?

• 12

• 35

• 24

• 38