Similarity and Proportion

The triangles shown are similar. What is the scale factor?

• $\frac{3}{4}$ or $\frac{4}{3}$

• $\frac{2}{5}$ or $\frac{5}{2}$

• $\frac{3}{5}$ or $\frac{5}{3}$

• $\frac{4}{5}$ or $\frac{5}{4}$

The triangles shown are similar. What is the scale factor?

• $\frac{4}{1}$ or $\frac{1}{4}$

• $\frac{2}{3}$ or $\frac{3}{2}$

• $\frac{1}{3}$ or $\frac{3}{1}$

• $\frac{2}{1}$ or $\frac{1}{2}$

The triangles shown are similar. Find X.

• x = 36.75

• x = 18

• x = 54

• x = 36

• x = 48

The triangles shown are similar. Find X.

• x = 60

• x = 9.6

• x = 20

• x = 32

• x = 72

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

• x = 1

• x = 3

• x = 9

• x = 5

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

• x = 20

• x = 12

• x = 5

• x = 4

The polygons in each pair are similar. Find the missing side length.

• 30

• 28

• 33

• 20

The polygons in each pair are similar. Find the missing side length.

• 23

• 12

• 57

• 35

Solve for x. The triangles in each pair are similar.

• 13

• 11

• 3

• 6

Are the two figures similar?

• yes

• no