Similarity Perimeter and Area

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

Which statement best describes what a ratio is.

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

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

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

Given the 2 similar rectangles, what is the perimeter of the smaller rectangle?

• 32 feet

• 42 feet

• 19.25 feet

• 22.4 feet

What is the ratio of the areas for the following rectangles?

• 10/7

• 100/49

• 100/36

• 4/36

Two hexagons are similar with a similarity ratio 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

The perimeter of one rectangle is 12 units. The perimeter of the second rectangle is 20 units. If the area of the SECOND 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

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

• 11/6
• 6/11
• 121/36
• 36/121

The area of triangle A is 54 and the area of triangle B is 150. What is the similarity ratio of A to B?

• 9:25

• 27:75

• 3:5

• 25:9