Applying concepts in similarity to perimeter

What is the ratio of the perimeter of  $\Delta FDE\ \ to\ \Delta CAB?$  

• 3 : 1

• 2 : 3

• 4 : 2

• 3 : 2

The longest side of a triangle is 12 cm and the shortest side is 9 cm. Find the shortest side of a similar triangle whose longest side is 20 cm.

• 15

• 5.4

• 10

• 16

The pair of figures to the right are similar. Compare the first figure to the second. Give the ratio of the perimeters and the ratio of the areas.

• The ratio of the perimeters is 4/7

• The ratio of the areas is 64/196

• The ratio of the perimeters is 8/14

• The ratio of the areas is 16/49

Find the missing side of the large triangle, then, find the PERIMETER of the large triangle.

• the missing side is 12, the perimeter is 24
• the missing side is 12, the perimeter is 36

The figures are similar. Find the perimeter of the second figure.

• 8ft

• 12ft

• 18ft

• 15ft

What is the perimeter of  $\Delta ABC$  ?

• 13

• 14

• 26

• Cannot be determined from the information given.  

If two similar polygons have perimeters in the ratio 4:9, and the perimeter of the smaller polygon is 16 units, what is the perimeter of the larger polygon?

• 36

• 40

• 32

• 48

The two triangles are similar. What

is the perimeter of triangle XYZ?

perimeter = (a)   cm

Tags

7.5.C

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

• 81
• 432
• 576
• 243

The figures below are similar. The labeled sides are corresponding.

What is the ratio of the perimeter of the smaller pentagon to the larger pentagon?

• 9:5

• 25:81

• 5:9

• 81:25