Ratios, Proportions, and Similar Polygons

The pair of figures is similar. Find the missing side.

• x = 20

• x = 12

• x = 5

• x = 4

Two polygons are similar. The perimeter of the first polygon is 72 inches. The perimeter of the second polygon is 90 inches. What is the scale factor of the first polygon to the second polygon?

• 72 : 90

• 90 : 72

• 4 : 5

• 5 : 4

In similar Polygons, corresponding sides are ___ and corresponding angles are ___. (Fill in the blanks)

• congruent, proportional 

• proportional, congruent 

• congruent, congruent

• proportional, proportional

Which is NOT equivalent to 3:5?

• 15:25

• 9:15

• 21:28

• 30:50

Are the two figures similar

• yes

• no

Solve for x. 

• 8

• 6

• 10

• 12

• P = 85 feet

• P = 106.25 feet

• P = 68 feet

The pair of figures is similar. Find the missing side.

• x = 10

• x = 4

• x = 2

• x = 5

Find the scale factor.

• 4:1

• 1:3

• 2:1

• 7:3

Solve for x

• x=6

• x =1/6

• x = 7

• x=9