Scale Factor Area

Multiple Choice

What is the perimeter of the rectangle?

• 17 cm

• 34 cm

• 60 cm

• 32 cm

Multiple Choice

What is the missing measurement? 

• 9 cm

• 18 in

• 18 cm

• 9 in 

Multiple Choice

Find the area of the rectangle.

• 21 ft²

• 180 ft²

• 42 ft²

• 90 ft²

Multiple Choice

Find the area of the rectangle.

• 140 cm²

• 70 cm²

• 34 cm²

• 35 cm²

• 17 cm²

Multiple Choice

The two rectangles are similar.

What is the length of the missing side?

• 21

• 1.25

• 20

• 4

Multiple Choice

The two triangles are similar.

What is the length of the missing side?

• 9mm

• 4mm

• 4/9mm

• 36mm

Multiple Choice

The two triangles are similar.

What is the scale factor from $$\Delta ZXY$$ to $$\Delta WUV$$ ?

• 6

• 4

• 2.5

• 1.5

• $$\frac{1}{4}$$

​​Perimeter

​​Area

Multiple Choice

The original perimeter of a rectangle is 30 cm.

If we dilate it by a scale factor of 4, what is the new perimeter?

• 120 cm

• 480 cm

• 1920 cm

• 60 cm

Multiple Select

If the perimeter of a rectangle is 20 in. and the perimeter after dilation is 30 in.,

what is the scale factor? Select all correct answers.

• 15

• 10

• 1.5

• $$\frac{3}{2}$$

• $$\frac{2}{3}$$

Multiple Choice

If both dimensions of a rectangle are doubled,

which of the following statements about its perimeter will be true?

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

• The new perimeter will be double the old perimeter.

• The new perimeter will be 4 times the old perimeter.

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

Multiple Choice

If a square is dilated by a scale factor of 3, which of the following statements about its area will be true?

• The new area will be 9 times the old area.

• The new area will be 3 times the old area.

• The new area will be 1/9 of the old area.

• The new area will be 1/3 of the old area.

Multiple Choice

The original area of a rectangle is $$30\ cm^2$$ .

If we dilate it by a scale factor of 4, what is the new area?

• 120 cm²

• 480 cm²

• 1920 cm²

Multiple Choice

If a triangle is dilated by a scale factor of 3/2,

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

Multiple Choice

If a square's side lengths are doubled,

which of the following statements about its area will be true?

• The new area will be 4 times the old area.

• The new area will be 16 times the old area.

• The new area will be 1/4 of the old area.

• The new area will be 2 times the old area.

Multiple Choice

A rectangle that is 2 inches by 3 inches is dilated by a scale factor of 7.

 What is the perimeter of the scaled copy?

• 35 in

• 10 in

• 70 in

• 490in

Multiple Choice

A rectangle has the dimensions 4 cm by 5 cm.

A scale factor of 3 is used to enlarge the rectangle.

What is the new area?

• 20 cm²

• 60 cm²

• 180 cm²

• 100 cm²

Multiple Choice

A rectangle that is 2 inches by 3 inches is dilated by a scale factor of 7.

 What is the area of the scaled copy?

• 20 sq in.

• 42 sq in.

• 49 sq in.

• 294 sq in.

• 252 sq in.

Multiple Choice

The side length of a smaller square is one-third the side length of a larger square.

Which of the following statements describes the area of the smaller square?

• The area of the smaller square is $$\frac{1}{27}$$ the area of the larger squre.

• The area of the smaller square is $$\frac{1}{6}$$ the area of the larger square.

• The area of the smaller square is $$\frac{1}{9}$$ the area of the larger square.

• The area of the smaller square is $$\frac{1}{3}$$ the area of the larger square.