Changing a Scale — Unit test Answers

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21
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A scale factor of 5 is used to enlarge a figure as shown below.What is the area of the smaller figure, in square centimeters?

Question illustration
A
4
B
8
C
20
D
40
22
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The rectangle below was enlarged using a scale factor. What is the area of the original rectangle?

Question illustration
A
8 cm²
B
20 cm²
C
25 cm²
D
40 cm²
23

Josephine was asked to make a one-fiftieth scale model of the new water tower for her town. She constructed the model that is shown below. Not drawn to scaleWhat is the height of the town’s new water tower in feet? Round to the nearest whole number.

Question illustration
A
22 feet
B
40 feet
C
63 feet
D
113 feet
24

A rectangular magazine cover is photocopied by using a scale factor of . The length of the photocopy of the magazine cover is

Question illustration
A
enlarged by a factor of 3.
B
enlarged by a factor of .
Option B
C
reduced by a factor of 3.
D
reduced by a factor of .
Option D
25

Theo used a map that had a ratio of to plan a road trip. He found that the distance on the map from New York City, NY, to Washington, DC, was 14.4 centimeters. How many miles would he have to drive to make that trip?

Question illustration
A
10.4
B
43.2
C
240
D
720
26

Kiesha and her classmates wrote proportions for the reduction of a triangle. Which proportions are set up correctly? Select three options.

Question illustration
A
StartFraction original height over original base EndFraction = StartFraction reduction height over reduction base EndFraction
Option A
B
StartFraction original height over reduction height EndFraction = StartFraction original base over reduction base EndFraction
Option B
C
StartFraction original height over reduction base EndFraction = StartFraction reduction height over original base EndFraction
Option C
D
StartFraction reduction height over reduction base EndFraction = StartFraction original height over original base EndFraction
Option D
E
StartFraction original height over original base EndFraction = StartFraction reduction base over reduction height EndFraction
Option E
27

The scale drawing below shows an enlargement by a scale factor of 2. What is the missing side length in the original trapezoid?

Question illustration
A
4.5
B
9
C
13.5
D
18

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