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Grade 8 HMH Go Math - Answer Keys
Chapter 9:Transformations and Congruence; Model Quiz
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9.1–9.3 Properties of Translations, Reflections, and Rotations
Question 1
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Graph the image of triangle ABC after a translation of 6 units to the right and 4 units down. Label the vertices of the image A’, B’, and C’.
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Question 2
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On the same coordinate grid, graph the image of triangle ABC after a reflection across the x-axis. Label the vertices of the image A”, B”, and C”.
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Question 3
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Graph the image of HIJK after it is rotated 180° about the origin. Label the vertices of the image H’I’J’K’.
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9.4 Algebraic Representations of Transformations
Question 4
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A triangle has vertices at (2, 3), (−2, 2), and (−3, 5). What are the coordinates of the vertices of the image after the translation (x, y) → (x + 4, y − 3)?
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9.5 Congruent Figures
Question 5
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Vocabulary Translations, reflections, and rotations produce a figure that is _____ to the original figure.
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Question 6
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Use the coordinate grid for Exercise 3. Reflect H’I’J’K’ over the y-axis, then rotate it 180° about the origin. Label the new figure H″I″J″K″.
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ESSENTIAL QUESTION
Question 7
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How can you use transformations to solve real-world problems?
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