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Grade 8 HMH Go Math - Answer Keys
Chapter 10:Transformations and Similarity; Lesson 1: Properties of Dilations
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10.1 Independent Practice
For 7–11, tell whether one figure is a dilation of the other or not. Explain your reasoning.
Question 7
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Quadrilateral MNPQ has side lengths of 15 mm, 24 mm, 21 mm, and 18 mm. Quadrilateral M′N′P′Q′ has side lengths of 5 mm, 8 mm, 7 mm, and 4 mm.
Question 8
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Triangle RST has angles measuring 38° and 75°. Triangle R′S′T ′ has angles measuring 67° and 38°. The sides are proportional.
Question 9
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Two triangles, Triangle 1 and Triangle 2, are similar.
Question 10
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Quadrilateral MNPQ is the same shape but a different size than quadrilateral M′N′P′Q.
Question 11
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On a coordinate plane, triangle UVW has coordinates U(20, −12), V(8, 6), and W(−24, -4). Triangle U′V′W′ has coordinates U′(15, −9), V′(6, 4.5), and W′(−18, -3).
Complete the table by writing “same” or “changed” to compare the image with the original figure in the given transformation.
Question 16
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Describe the image of a dilation with a scale factor of 1.