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Click Once to BeginJEOPARDY!

Stretching and shrinking

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JEOPARDY!

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Vocabulary

Hodge Podge

Problems 1

Problems 2

Problems 3

Problems 4

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A comparison of two quantities

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ratio

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The number used to multiply a figure by to get a

similar figure

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Scale factor

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Sides that are in the same position in a similar figure are

called….

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Corresponding sides

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Corresponding angles must have the same?

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measure

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Similar figures must have: (two things)

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1. Corresponding angles have the same measure, 2.

corresponding sides have equivalent ratios.

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What is the relationship between 3 and 1/3 called?

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reciprocals

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What is the number 8 called in the rule (8x,8y)?

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coefficient

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If we apply the following rule, will we have similar

figures? Why or why not? (.5x,.5y)

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Yes, the coefficients of x and y are the same

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What copier size factor would you apply to enlarge a figure 1.5 times?

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150 %

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If the perimeter of one figure is 10, and

the perimeter of a similar figure is 50, what was the scale

factor used to enlarge the figure?

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5

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I want to enlarge a 3 x 5 inch picture by a

scale factor of 300%. How large would it be?

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9 x 15

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Which of the following rectangles are similar? Show math to prove.

4 x 86 x 16

10 x 20

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4 x 8 and 10 x 20

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A figure was enlarged by a scale factor of 4.

How many times bigger is the perimeter?

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4

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A figure was enlarged by a scale factor of 4,

how many times bigger is the area?

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4 squared = 16 times bigger

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21

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X = 36

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1080 cm

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2x,2y

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Explain what happens to the figure when the

rule is applied

(3x,6y)

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3 times wider, 6 times taller

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A model tv is created. The actual tv screen is

18.8 cm by 24.5 cm. The scale factor

between the actual and model is 1/5. What are the dimensions of the

model tv?

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3.76 cm x 4.9 cm

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If you applied the rule (2x, 1/2y) to a figure, would the figures be similar? Why or why

not?

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No, different coefficients.

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A scale factor of 3 is applied to a figure.

How many times bigger will the area of

the image be?

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9

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(.5x, .5y) yes they are similar. Scale factor is

1/2

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10/8 or 1.25

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RS = 6RQ = 10

y = 50 degrees

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192 cm squared

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10

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5/6 = x /24

x = _____

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20

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3/7 ÷ 4/7

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3/4

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Write the fraction as a decimal and as a percent.

3/8

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.375 = 37.5 %