JEOPARDY!
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Transcript of JEOPARDY!
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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 %