Similar Figures Ratios

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

• x = 12

• x = 3

• x = 40

• x = 4

The polygons are similar. Find x.

• x = 2

• x = 6

• x = 4 

• x = 8

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

• x = 11

• x = 4.5

• x = 5

• x =4

The two right triangles below are similar. What is x, the missing side length in triangle DEF? 

• 3.75

• 9.75

• 10

• 12

Tell whether the two figures are similar. Explain your reasoning.

• Yes, similar because they are the same shape and side lengths are proportional.

• No, not similar because they are the same shape, but side lengths are not proportional.

• Yes, same shape

• No, different sizes

When two figures are similar their ​ (a)   sides should be ​ (b)   .

(This means the ​ (c)   should be ​ (d)   )

• Corresponding

• proportional

• ratios

• equal

If two figures are similar, the corresponding sides are (a)   .

• equal

• congruent

• proportional

• none of these

Which best describes the pair of figures?

(a)  

• similar

• not similar

• congruent

• Proportional

Are the two figures similar?

• yes

• no

Which best describes the pair of figures?

• similar

• not similar

• congruent

• Proportional