积极 AI Logo 积极 AI

勾股定理第二部分

勾股定理第二部分
几何画板及绘图内容加载中，请稍等……
2015-05-17 17:14
测试改名0角几何作图
所属专题 Euclid's proof of Pythagoras Theorem (proposition 47) Pythagoras' theorem Y10 Pythag & Trig
本范例演示了勾股定理的第二部分，通过构造直角三角形的边长关系，展示了直角三角形斜边与两腰的关系。核心数学概念包括直角三角形、勾股定理。使用了Segment、OrthogonalLine、Point、Angle、Circle、Intersect、Polygon、PointIn等GeoGebra命令。适合初中及以上学生学习几何作图。

GeoGebra 命令及参数

  1. Segment(A, B) → a
  2. OrthogonalLine(A, a) → b
  3. Point(b) → C
  4. Segment(C, A) → c
  5. Segment(C, B) → d
  6. Angle(B, A, C) → α
  7. Circle(B, A) → e
  8. Circle(A, B) → f
  9. OrthogonalLine(B, a) → g
  10. OrthogonalLine(A, a) → h
  11. Intersect(f, h, 1) → D
  12. Intersect(e, g, 1) → E
  13. Segment(D, E) → i
  14. Segment(B, A) → j
  15. Segment(A, D) → k
  16. Segment(E, B) → l
  17. Circle(A, C) → p
  18. Circle(C, A) → q
  19. OrthogonalLine(A, c) → m
  20. Intersect(p, m, 1) → F
  21. OrthogonalLine(C, c) → n
  22. Intersect(q, n, 1) → G
  23. OrthogonalLine(C, d) → r
  24. OrthogonalLine(B, d) → s
  25. Circle(B, C) → t
  26. Circle(C, B) → c_1
  27. Intersect(c_1, r, 2) → H
  28. Intersect(t, s, 2) → I
  29. Segment(B, I) → a_1
  30. Segment(I, H) → b_1
  31. Segment(H, C) → d_1
  32. Segment(C, G) → e_1
  33. Segment(F, A) → f_1
  34. Segment(F, G) → g_1
  35. OrthogonalLine(A, d) → h_1
  36. Intersect(h_1, d) → J
  37. Intersect(h_1, b_1) → K
  38. Polygon(J, K, H, C) → poly1, j_1, k_1, h_2, c_2
  39. Polygon(A, C, G, F) → poly2, a_2, c_3, g_2, f_2
  40. Segment(A, J) → i_1
  41. Polygon(J, B, I, K) → poly3, j_2, b_2, i_2, k_2
  42. Polygon(A, D, E, B) → poly4, a_3, d_2, e_2, b_3
  43. PointIn(poly1) → Pointpoly1
  44. PointIn(poly2) → Pointpoly2
  45. PointIn(poly3) → Pointpoly3
  46. PointIn(poly4) → Pointpoly4
  47. Segment(J, K) → l_1
  48. Polygon(A, I, B) → poly5, b_4, a_4, i_3
  49. Polygon(C, B, E) → poly6, e_3, c_4, b_5
  50. PointIn(poly5) → Pointpoly5
  51. PointIn(poly6) → Pointpoly6