Area and Perimeter of Similar Shapes

The figures are similar. Find the area of the larger rectangle.

• 108 ft²

• 54 ft²

• 6.75 ft²

• 100 ft²

If the ratio of perimeters of 2 triangles is 3:4, and the area of the smaller triangle is 324, what is the area of the larger triangle?

• 81

• 432

• 576

• 243

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

What is the ratio of the PERIMETER of these shapes green to purple ? (In simplest form)

• 2

• 1/2

• 4

• 1/4

What is the ratio of the AREA of these shapes green to purple ? (In simplest form)

• 2

• 1/2

• 4

• 1/4

These figures are similar. Find the value of "a".

• 8

• 3

• 64

• 9

These figures are similar. Find the value of "z".

• 16

• 4

• 12

• 36

If the perimeter of the purple figure is 144 cm, what is the perimeter of the green figure.

• 72 cm

• 36 cm

• 144 cm

• 30 cm

If the scale factor of 2 similar figures is 3:8, what is the ratio of their PERIMETERS?

• 8:3

• 3:8

• 9:64

• 64:9

If the scale factor of 2 similar figures is 3:8, what is the ratio of their AREAS?

• 8:3

• 3:8

• 9:64

• 64:9