Similar Figures

What is the ratio of the surface areas from large to small. 

• 49/16

• 7/4

• 42/24

• 10/8

If the cylinders below are similar, what is the ratio of the radius of the larger cylinder to the radius of the smaller cylinder?

• 4:1

• 18:3

• 2:1

• 43:10

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

• equal

• congruent

• proportional

• none of these

• A

• B

• C

• D

Figure JKLM is similar to figure PQRS.

Which proportion must be true for

these figures?

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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

As it relates to geometry, what does it mean for figures to be similar?

• corresponding sides are proportional and corresponding angles are congruent

• corresponding sides and angles are congruent

• angles are similar, and side lengths are the same, producing a figure that looks very close to another one.

• neither sides or angles are congruent

Figure ABCDE is similar to figure VWXYZ.

Are the two figures similar?

• yes

• no

Figure ABCDE is similar to figure VWXYZ. Which proportion must be true?

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