Changing Dimensions Practice - 3.4 1B

If the scale factor of the sides of two similar figures is r, how many times bigger is the area?

• r

• r²

• r³

• 2r

If the scale factor of the sides of two similar figures is r, how many times bigger is the perimeter?

• r²

• r³

• 2r

• r

Rectangle A (enlarged figure) has an area of 180 square cm and Rectangle B (original image) has an area of 20 square cm. The two rectangles are similar. What is the scale factor of their perimeters?

• 9

• 3

• 2

• 1

Rectangle A (enlarged figure) has an area of 180 square cm and Rectangle B (original image) has an area of 20 square cm. The two rectangles are similar. What is the ratio of areas?

• 9

• 3

• 2

• 1

How many times bigger is the area of the red parallelogram (the enlarged image) than the blue parallelogram (original image)?

• 11/6

• 6/11

• 121/36

• 36/121

Find the missing perimeter.

• 15

• 20

• 25

• 30

Tags

CCSS.HSG.GPE.B.7

Find the missing area.

• 0

• 12

• 24

• 30

Tags

CCSS.7.G.B.6

What happens to the perimeter of a square if the sides are    halved?

• doubles
• halved
• quadrupled
• forthed

Tags

CCSS.7.G.B.6

CCSS.7.RP.A.2

CCSS.7.RP.A.3

If a rectangle is drawn and another rectangle is drawn so that the sides are twice as big as the first rectangle, what happens to the area?

• doubles
• triples
• quadruples
• not enough information

Find the perimeter of the large triangle.

• 24
• 36
• 12
• 54

Tags

CCSS.7.G.B.6