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Rectangle Properties Exploration

Rectangle Properties Exploration
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2019-10-18 03:09
PolygonAngleCoordinate Geometry
This example demonstrates the geometric properties and calculations of rectangles. It involves core concepts like area, coordinate geometry, incircle, angles, midpoints, and symmetry transformations. The construction uses commands such as Segment, OrthogonalLine, Point, Intersect, Angle, Midpoint, Polygon, Line, and Mirror. Suitable for middle school and above students learning geometric constructions and property exploration.

GeoGebra Commands & Parameters

  1. Segment(A, B) → a
  2. OrthogonalLine(A, a) → b
  3. OrthogonalLine(B, a) → c
  4. Point(b) → D
  5. OrthogonalLine(D, b) → d
  6. Intersect(c, d) → C
  7. Segment(D, A) → e
  8. Segment(D, C) → f
  9. Segment(C, B) → g
  10. Angle(C, B, A) → α
  11. Angle(B, A, D) → β
  12. Angle(A, D, C) → γ
  13. Angle(D, C, B) → δ
  14. Midpoint(D, B) → M
  15. Segment(D, M) → h
  16. Segment(M, B) → i
  17. Segment(A, M) → j
  18. Segment(M, C) → k
  19. Angle(B, A, M) → ε
  20. Angle(M, B, A) → ζ
  21. Angle(D, C, M) → η
  22. Angle(M, D, C) → θ
  23. Angle(A, D, M) → ι
  24. Angle(M, A, D) → κ
  25. Angle(C, B, M) → λ
  26. Angle(M, C, B) → μ
  27. Polygon(A, B, C) → poly1, c_1, a_1, b_1
  28. Line(A, C) → n
  29. Mirror(A, n) → A'
  30. Mirror(B, n) → B'
  31. Mirror(C, n) → C'
  32. Polygon(A', B', C') → poly_2, c', a', b'
  33. Polygon(D, A, B) → poly2, b_2, d_1, a_2
  34. Mirror(D, a_2) → D'
  35. Mirror(A, a_2) → A'_1
  36. Mirror(B, a_2) → B'_1
  37. Polygon(D', A'_1, B'_1) → poly2', b'_1, d', a'_1
  38. Polygon(A, B, C, D) → poly3, a_3, b_3, c_2, d_2
  39. Segment(A, C) → q
  40. Segment(D, B) → t