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Reflections

TEXTBOOK REFERENCE: 10-9. Reflections. What are transformations?. Transformations refer to the movement of figures in the coordinate plane. There are four types: Re FL ections ( FL ips ) Tran SL ations ( SL ides ) Ro T a T ions ( T urns) Dilations (bigger or smaller). RE ECTION.

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Reflections

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  1. TEXTBOOK REFERENCE: 10-9 Reflections

  2. What are transformations? Transformations refer to the movement of figures in the coordinate plane. There are four types: ReFLections (FLips) TranSLations (SLides) RoTaTions (Turns) Dilations (bigger or smaller)

  3. REECTION FL FL ( IP) FL FL ( IDE) TRANATION SL SL T T RO A ION (TURN) Dilation (Bigger or smaller)

  4. Reflections: What they look like! y 6 G 5 4 3 2 1 H F x -1 -2 -3 -4 -5 -6 1 2 3 4 5 6 -6 -5 -4 -3 -2 -1 You can reflect objects across the x- axis.

  5. Reflections: What they look like! y 6 G 5 4 3 2 1 H F x -1 -2 -3 -4 -5 -6 1 2 3 4 5 6 -6 -5 -4 -3 -2 -1 You can reflect objects across the y- axis.

  6. The new reflected coordinates are called prime! Graphing Reflections COUNT TO THE AXIS over xover y Triangle PQR with P(1,2) Q(8,2) R(8,6) Triangle QRS with Q(-3, 3) R(-7, 3) S(-7, 8) reflected over the x-axis reflected over the y-axis

  7. Graphing Reflections, cont. What do you notice about the preimage coordinates and the prime coordinates? Reflected over xreflected over y P(1,2) Q(8,2) R(8,6) Q(-3, 3) R(-7, 3) S(-7, 8) P’(-1,2) Q(-8, 2) R(-8, 6) Q’(-3, -3) R’(-7, -3) S’(-7, -8)

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