AC Math 7 Practice Problems for Test

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AC Math 7Practice Problems for Test
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• Johns mom has a frame that is 18 inches long
  and 12 inches wide. She is going to dilate a
  photo similar to the frame that has a width of 3
  inches. What is the length of the photo before
  it is dilated to fit the frame?
• 2 inches
• 4.5 inches
• 36 inches
• 72 inches

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Answer to 1

• 4 ½ or 4.5 inches

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• 2. Mrs. Sangster and Mr. Blacher decide to
  dilate the area of the school garden. The
  original length of the garden is 20 feet and the
  area is 200 square feet. The length of the new
  garden will be 30 feet. What will be the area of
  the new garden?
• 450 square feet
• 300 square feet
• 88 8/9 square feet
• 133 1/3 square feet

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Answer to 2

• 450 square feet

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• One vertice of a triangle on the coordinate plane
  has the coordinates of (-8, 12). The triangle
  undergoes a 75 dilation. What would be the new
  coordinates of the corresponding vertice?
• (-14, 21)
• (6, 9)
• (-6, 9)
• (14, 21)

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Answer to 3

• (-6, 9)

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• What is the ratio of the area of the first
  triangle to the area of second triangle?
• 41
• 14
• 161
• 164

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Answer for 4

• 161

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• 5. What is the perimeter of the larger triangle?
• 3 inches
• 12 inches
• 36 inches
• 48 inches

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Answer to 5

• 48 inches

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• 6. A yard stick has a shadow of 12 feet. At the
  same time, a tree has a shadow of 40 feet. How
  tall is the tree?
• 10 feet
• 3 1/3 feet
• 160 feet
• 9/10 feet

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Answer to 6

• 10 feet

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• What is the scale factor of the reduction of the
  similar figures?
• 5/3
• 3/5

5 inches
3 inches
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Answer to 7

• 3/5

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• The End