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Ninth Grade (Grade 9) Symmetry and Transformations Questions

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Grade 9 Symmetry and Transformations
4:9 is an enlargement and 9:4 is a reduction.
  1. True
  2. False
Grade 9 Symmetry and Transformations
At how many different angles does a circle have reflection symmetry?
  1. None
  2. 360
  3. Infinite
  4. It depends on the circle.
Grade 9 Symmetry and Transformations CCSS: HSG-SRT.A.1, HSG-SRT.A.1b
Line segment [math]bar{PQ}[/math] is dilated by a factor of 2/3, with the center of dilation being (-3,-2). Determine the length of the dilated line segment, [math]P'Q'[/math], in relation to [math]PQ[/math].
  1. [math]P'Q' = 2/3 PQ[/math]
  2. [math]P'Q' = 3/2 PQ[/math]
  3. [math]P'Q' = 9/4 PQ[/math]
  4. Not enough information given.
Grade 9 Symmetry and Transformations CCSS: HSG-SRT.A.1, HSG-SRT.A.1a
Line [math]t[/math], with equation [math]y = -8x+6[/math], is dilated by a factor of [math]1/2[/math] with the center of dilation being the origin. What is the equation of the dilated line?
  1. [math]y = -4x + 6[/math]
  2. [math]y = -4x + 3[/math]
  3. [math]y = -8x + 3[/math]
  4. [math]y = -16x + 12[/math]
Grade 9 Symmetry and Transformations CCSS: HSG-SRT.A.1, HSG-SRT.A.1b
[math]Delta ABC[/math] is dilated by a factor of 2 with the origin as the center of dilation. Which of the following gives the perimeter of the image [math]Delta A'B'C' ?[/math]
  1. [math]2 AB + BC + AC[/math]
  2. [math]2AB + 2BC + 2AC[/math]
  3. [math]2^3(AB+ BC+AC)[/math]
  4. [math]2A'B' + 2B'C' + 2A'C'[/math]
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