圆锥曲线:椭圆、抛物线、双曲线

圆锥曲线:椭圆、抛物线、双曲线
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2018-07-08 10:32
①本范例演示了圆锥曲线(椭圆、抛物线、双曲线)的形成与性质;②涉及的核心数学概念包括圆锥曲线的定义、标准方程、几何性质以及向量与角度的应用;③作图要点——从『构造摘要』中提炼出使用了Circle(圆)、Point(点)、LineBisector(角平分线)等GeoGebra命令与对象;④适合高中数学学生及需要直观理解圆锥曲线几何本质的教学或学习用途。

GeoGebra 命令及参数

  1. Circle(center, m) → c
  2. Point(c) → n
  3. Circle(center_1, m_1) → c_1
  4. Point(c) → A
  5. Point(c) → B
  6. Point(c) → D
  7. Point(c) → E
  8. Point(c) → F
  9. Point(c) → G
  10. Point(c) → H
  11. Point(c) → I
  12. Point(c) → J
  13. Point(c) → K
  14. Point(c) → L
  15. Point(c) → M
  16. Point(c) → N
  17. Point(c) → O
  18. LineBisector(M, pointie) → g_1
  19. LineBisector(N, pointie) → h_1
  20. LineBisector(O, pointie) → i_1
  21. LineBisector(L, pointie) → j_1
  22. LineBisector(K, pointie) → k_1
  23. LineBisector(J, pointie) → l_1
  24. LineBisector(I, pointie) → n_1
  25. LineBisector(H, pointie) → p_1
  26. LineBisector(G, pointie) → q_1
  27. LineBisector(F, pointie) → r_1
  28. LineBisector(E, pointie) → s_1
  29. LineBisector(D, pointie) → t_1
  30. LineBisector(B, pointie) → b_1
  31. LineBisector(A, pointie) → d_1
  32. LineBisector(pointie, m) → e_1
  33. LineBisector(pointie, n) → f_2
  34. Point(c) → Q
  35. Point(c) → R
  36. Point(c) → T
  37. Point(c) → U
  38. Point(c) → W
  39. LineBisector(Q, pointie) → g_2
  40. LineBisector(R, pointie) → h_2
  41. LineBisector(T, pointie) → i_2
  42. LineBisector(U, pointie) → j_2
  43. LineBisector(W, pointie) → k_2
  44. Point(c) → Z
  45. LineBisector(pointie, Z) → l_2
  46. Point(c) → P
  47. LineBisector(P, pointie) → f
  48. Point(c) → C
  49. LineBisector(C, pointie) → g
  50. Point(c) → S
  51. LineBisector(S, pointie) → h