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垂直双曲线

垂直双曲线
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2018-02-24 01:24
函数解析几何变换
①本范例演示垂直双曲线的几何构造与性质；②涉及核心数学概念包括双曲线的定义、焦点、顶点、渐近线、离心率等；③作图要点：使用GeoGebra命令如Focus, Point, Segment, Asymptote, Intersect, Center, Vertex, OrthogonalLine, Line, Polygon, Circle等构建双曲线的关键元素；④适合高中解析几何教学或数学爱好者探索双曲线特性。

GeoGebra 命令及参数

  1. Focus(c_2) → F_2, F_1
  2. Point(c_2) → M_1
  3. Segment(F_1, M_1) → d_1
  4. Segment(F_2, M_1) → d_2
  5. Point(c_2) → M_2
  6. Segment(F_2, M_2) → d_4
  7. Segment(M_2, F_1) → d_3
  8. Asymptote(c_2) → i, j
  9. Intersect(j, i) → F
  10. Center(Hyperbola[F_2, F_1, b]) → Center
  11. Vertex(Hyperbola[F_2, F_1, a]) → V_2, V_1, ,
  12. OrthogonalLine(B, xAxis) → e
  13. OrthogonalLine(A, xAxis) → f
  14. Line(V_1, xAxis) → g
  15. Line(V_2, xAxis) → l
  16. Intersect(e, g) → C
  17. Intersect(f, g) → D
  18. Intersect(f, l) → E
  19. Intersect(e, l) → G
  20. Polygon(C, D, E, G) → poly1, c_1, d_6, e_1, g_1
  21. Segment(Center, V_1) → a_1
  22. Segment(V_1, C) → b_1
  23. Circle(Center, F_1) → p
  24. Point(p) → H
  25. Segment(Center, H) → m
  26. Intersect(c_1, b_1) → I
  27. Intersect(g_1, c_1) → J
  28. Segment(Center, J) → c
  29. Segment(Center, H) → n