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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 ¯PQ is dilated by a factor of 2/3, with the center of dilation being (-3,-2). Determine the length of the dilated line segment, P′Q′, in relation to PQ.
  1. P′Q′=23PQ
  2. P′Q′=32PQ
  3. P′Q′=94PQ
  4. Not enough information given.
Grade 9 Symmetry and Transformations CCSS: HSG-SRT.A.1, HSG-SRT.A.1a
Line t, with equation y=-8x+6, is dilated by a factor of 12 with the center of dilation being the origin. What is the equation of the dilated line?
  1. y=-4x+6
  2. y=-4x+3
  3. y=-8x+3
  4. y=-16x+12
Grade 9 Symmetry and Transformations CCSS: HSG-SRT.A.1, HSG-SRT.A.1b
ΔABC 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 ΔA′B′C′?
  1. 2AB+BC+AC
  2. 2AB+2BC+2AC
  3. 23(AB+BC+AC)
  4. 2A′B′+2B′C′+2A′C′
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