Proportional Sides of Triangles

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

• x = 1

• x = 3

• x = 9

• x = 5

Find side length X.

• 30

• 25

• 15

• 40

If two figures are similar, the corresponding sides are ______________.

• equal

• congruent

• proportional

• none of these

Are the following similar? Why or why not?

• Yes. All pairs of corresponding angles are congruent.

• No, the corresponding angles are not equal.

• No, the ratios of the corresponding sides are not equal.

• A
• B
• C
• D

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

Given ∆ABC ~ ∆LMN, what is the length of segment AC?

• 11

• 12

• 22

• 24

• (1)

• (2)

• (3)

• (4)

How long is side x?

• 3

• 1.5

• 8

• 2/3

Are Triangle ABC and Triangle XYZ similar?

• No, corresponding angles are not congruent

• No, corresponding sides are not proportional

• Yes, corresponding angles are congruent

• Yes, corresponding sides are proportional