Perimeter & Area (Scale Factors)

Presentation

•

Mathematics

•

8th Grade

•

Medium

•

CCSS

7.G.A.1, 4.MD.A.3, 3.MD.C.7B

Standards-aligned

Catherine Chambers

Used 109+ times

FREE Resource

4 Slides • 18 Questions

Multiple Choice

What is the perimeter of this 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.

21 ft²

180 ft²

42 ft²

90 ft²

Multiple Choice

Find the area of the rectangle.

140 cm²

70 cm²

34 cm²

64 cm²

Multiple Choice

The two rectangles are scale drawings. What is the measurement of x?

1.25

Multiple Choice

what is the length of x?

9mm

4mm

4/9mm

36mm

Multiple Choice

What is the scale factor?

2.5

1.5

Perimeter

Area

Multiple Choice

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

Multiple Choice

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

Multiple Choice

If both dimensions of a rectangle are doubled, then 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's side lengths enlarged by a SF of 2, then 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

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

120

480

1920

Multiple Choice

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

Multiple Choice

If a square's side lengths are doubled, then 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 has been scaled by a 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 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

Multiple Choice

A rectangle that is 2 inches by 3 inches has been scaled by a factor of 7

What is the area of the scaled copy?

20 sq in

42 sq in

49 sq in

294 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.

What is the perimeter of this rectangle?

17 cm

34 cm

60 cm

32 cm

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