Perimeters and Areas of Similar Figures

The scale factor of two similar figures is 4 : 5. What is the ratio of their perimeters?

• 4 : 5

• 16 : 25

• 64 : 125

• 8 : 10

Tags

CCSS.7.G.A.1

CCSS.7.RP.A.2

Which statement best describes what a ratio is.

• A number
• A comparison of two quantities using division.
• A comparison
• A comparison of many things.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

If the ratio of 2 round dinner plates is 2 : 5, what is the ratio of their areas?

• 2 : 5

• 1 : 5

• 4 : 10

• 4 : 25

Tags

CCSS.7.G.A.1

The playing surfaces of two foosball tables are similar. The ratio of the corresponding side lengths  is 10:7. What is the ratio of the areas? 

• 200: 494
• 100 : 28
• 832 : 48
• 100 : 49

Tags

CCSS.7.G.A.1

CCSS.7.G.B.6

CCSS.7.RP.A.2

What is the perimeter ratio of the following rectangles?

• 7/6

• 10/6

• 5/3

• 10/7

Tags

CCSS.7.G.A.1

What is the area ratio of the following rectangles?

• 10/7

• 100/49

• 100/36

• 4/36

Tags

CCSS.7.G.A.1

Two hexagons are similar with a scale factor of 4/5. If the area of the larger hexagon is 20, what is the area of the smaller hexagon?

• 10.24

• 12.8

• 16

• 25

Tags

CCSS.7.G.A.1

CCSS.7.G.B.6

CCSS.7.RP.A.2

The perimeter of one rectangle is 12 units. The perimeter of another rectangle is 20 units. If the area of the SECOND (larger) rectangle is 16 square units, what is the area of the first rectangle?

• 5.76 square units

• 9.6 square units

• 26.7 square units

• 44.4 square units

Tags

CCSS.7.G.A.1

Find the ratio (red to blue) of the perimeter.

• 11/6
• 6/11
• 121/36
• 36/121

Tags

CCSS.7.RP.A.1

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Find the ratio (red to blue) of the area.

• 11/6
• 6/11
• 121/36
• 36/121

Tags

CCSS.7.G.A.1