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Parallelogram Properties Exploration by Kim Kembitzky

Parallelogram Properties Exploration by Kim Kembitzky
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2017-02-20 01:59
PolygonAngleGeometric ConstructionSlider Animation
This example demonstrates the geometric properties of a parallelogram, including equal opposite sides, equal opposite angles, and bisecting diagonals. It uses GeoGebra commands like Segment, Line, Intersect, Midpoint, Angle, Polygon, and Mirror to construct and verify these properties. Suitable for middle school and above students to visually understand parallelogram characteristics and assist geometry teaching.

GeoGebra Commands & Parameters

  1. Segment(A, B) → a
  2. Segment(A, D) → b
  3. Line(D, a) → c
  4. Line(B, b) → d
  5. Intersect(c, d) → C
  6. Segment(D, C) → e
  7. Segment(B, C) → f
  8. Midpoint(A, C) → E
  9. Segment(A, E) → g
  10. Segment(E, C) → h
  11. Segment(D, E) → i
  12. Segment(E, B) → j
  13. Angle(B, A, E) → α
  14. Angle(D, C, E) → β
  15. Angle(E, A, D) → γ
  16. Angle(C, B, E) → δ
  17. Angle(A, D, E) → ε
  18. Angle(E, B, A) → ζ
  19. Angle(E, D, C) → η
  20. Angle(E, C, B) → θ
  21. Angle(C, E, D) → ι
  22. Polygon(A, B, C) → poly1, c_1, a_1, b_1
  23. Mirror(A, g) → A'
  24. Mirror(B, g) → B'
  25. Mirror(C, g) → C'
  26. Polygon(A', B', C') → poly1', c', a', b'
  27. Polygon(A, B, D) → poly2, d_1, a_2, b_2
  28. Mirror(A, j) → A'_1
  29. Mirror(B, j) → B'_1
  30. Mirror(D, j) → D'
  31. Polygon(A'_1, B'_1, D') → poly2', d', a'_1, b'_1
  32. Angle(B, A, D) → κ
  33. Angle(A, D, C) → λ
  34. Angle(D, C, B) → μ
  35. Angle(C, B, A) → ν
  36. Polygon(A, B, C, D) → poly3, a_3, b_3, c_2, d_2