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Dilation Game by John Golden

Dilation Game by John Golden
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2015-03-14 23:57
Slider Animation
This example demonstrates the dilation of a preimage to an image, asking you to find the center of dilation. In challenge mode, you also need to find the scale factor. By adjusting the slider, you can dynamically observe the transformation process. This example covers core concepts such as dilation and geometric construction, suitable for middle school and above students.

GeoGebra Commands & Parameters

  1. Polygon(A, B, C, D) → poly1, a, b, c, d
  2. Element(list2, IndexOf[Min[list1], list1]) → Q_1
  3. PolyLine(Corner[1], Corner[2], Corner[3], Corner[4], Corner[1]) → e
  4. Intersect(Ray[P_1, Q_1], e) → E, E_1
  5. Dilate(A, r_1, D_1) → A'
  6. Dilate(B, r_1, D_1) → B'
  7. Dilate(C, r_1, D_1) → C'
  8. Dilate(D, r_1, D_1) → D'
  9. Polygon(A', B', C', D') → poly1', a', b', c', d'
  10. Textfield(scaleguess) → inputBox1