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9-3 Rotations

9-3 Rotations. Objective : To draw and identify rotation images of figures. Transformation Terms. Transformation: Moving a geometric figure Rigid Transformation or Isometry: congruent figures Non Rigid Transformation: figures not congruent Notation:

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9-3 Rotations

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  1. 9-3Rotations Objective: To draw and identify rotation images of figures

  2. Transformation Terms Transformation: Moving a geometric figure Rigid Transformation or Isometry: congruent figures Non Rigid Transformation: figures not congruent Notation: Preimage: Image [new figure]: Translation: Image slides. All points of figure slide along a parallel path. Rotation: All points rotate or turn around a point. Reflection: Produces the “mirror” image across a line - line of reflection

  3. Preimage Image Describe how to move from the preimage to the image. slide reflect rotate

  4. Rotational Symmetry Rotational Symmetry: Rotated image coincides with original n-fold rotational symmetry 900 1800 3600 2700 4-fold rotational symmetry

  5. p. 565: 17-20, 22

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