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Introduction to Transformations

Introduction to Transformations
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2018-04-02 23:31
VectorCoordinate GeometryTransformationGeometric Construction
This example demonstrates the basic concepts of geometric transformations, including translation, rotation, reflection, and dilation. The involved math concepts are vectors, coordinate geometry, and geometric construction. Key construction points involve using GeoGebra commands and objects like Vector, Translate, Rotate, CircleArc, Circle, Line, Mirror, Dilate, and Textfield. Suitable for middle school students and above to learn and understand the properties and applications of geometric transformations.

GeoGebra Commands & Parameters

  1. Vector(D, E) → u
  2. Translate(pic1, u) → pic1'
  3. Translate(B, u) → B'
  4. Translate(C, u) → C'
  5. Vector(B, B') → v
  6. Rotate(C, δ, A) → C'_1
  7. CircleArc(A, C'_1, C) → c
  8. CircleArc(A, C, C'_1) → d
  9. Circle(A, C) → e
  10. Line(F, G) → f
  11. Mirror(pic1, f) → pic1'_2
  12. Mirror(B, f) → B'_2
  13. Mirror(C, f) → C'_2
  14. Dilate(pic1, k, A) → pic1'_3
  15. Dilate(B, k, A) → B'_3
  16. Dilate(C, k, A) → C'_3
  17. Rotate(B, δ, A) → B'_1
  18. Rotate(pic1, δ, A) → pic1'_1
  19. Circle(A, C) → p
  20. CircleArc(A, C'_1, C) → r
  21. Textfield(δ) → InputBox1
  22. Textfield(k) → InputBox2