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8th grade (Illustrative Mathematics)

Course: 8th grade (Illustrative Mathematics) > Unit 2

Lesson 3: Lesson 7: Similar polygons
Math
8th grade (Illustrative Mathematics)
Unit 2: Dilations, similarity, and introducing slope
Lesson 7: Similar polygons
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Dilations: scale factor

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Problem

Triangle triangle, A, prime, B, prime, C, prime is the image of triangle, A, B, C under a dilation with a scale factor of 2.
A first quadrant coordinate plane.A triange has vertices A at nine, five, B at nine, two, and C at seven, one.
What is the length of segment start overline, A, prime, B, prime, end overline?
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
units
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