三角形的中心点

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. OrthogonalLine(A, a) → d
3. OrthogonalLine(C, c) → e
4. OrthogonalLine(B, b) → f
5. Intersect(d, f) → C_1
6. LineBisector(b) → h
7. LineBisector(c) → i
8. LineBisector(a) → j
9. Intersect(j, h) → C_2
10. Circle(C_2, C) → k
11. AngularBisector(C, B, A) → m
12. AngularBisector(B, A, C) → n
13. AngularBisector(A, C, B) → p
14. Intersect(n, m) → C_3
15. OrthogonalLine(C_3, a) → q
16. Intersect(q, a) → G
17. Circle(C_3, G) → r
18. Midpoint(b) → H
19. Midpoint(c) → I
20. Midpoint(a) → J
21. Segment(A, J) → s
22. Segment(C, I) → t
23. Segment(B, H) → a_1
24. Intersect(a_1, t) → C_4
25. Segment(C_2, C_1) → b_1
26. Line(C, B) → bc
27. Line(C, A) → ac
28. Line(A, B) → ab
29. Intersect(d, bc) → L
30. Intersect(f, ac) → M
31. Intersect(ab, e) → N
32. Segment(A, L) → f_1
33. Segment(C, N) → g_1
34. Segment(B, M) → h_1
35. Polygon(C, B, 3) → poly2, i_1, j_1, k_1, O
36. Polygon(A, C, 3) → poly3, l_1, m_1, n_1, P
37. Polygon(B, A, 3) → poly4, p_1, q_1, r_1, Q
38. Polygon(A, B, 3) → poly5, b_2, c_2, d_2, S
39. Polygon(B, C, 3) → poly6, e_2, f_2, g_2, T
40. Polygon(C, A, 3) → poly7, h_2, i_2, j_2, U
41. Circle(S, B, A) → c_1
42. Circle(B, T, C) → d_1
43. Circle(U, A, C) → e_1
44. LineBisector(r_1) → p_2
45. LineBisector(q_1) → q_2
46. Intersect(p_2, q_2) → R
47. Line(C, R) → s_1
48. LineBisector(m_1) → t_1
49. LineBisector(n_1) → a_2
50. Intersect(t_1, a_2) → A_1
51. Line(B, A_1) → n_2
52. LineBisector(k_1) → r_2
53. LineBisector(j_1) → s_2
54. Intersect(r_2, s_2) → B_1
55. Line(A, B_1) → t_2
56. Intersect(t_2, n_2) → C_7
57. Circle(B, A, Q) → c_3
58. Circle(C, A, P) → d_3
59. Circle(C, B, O) → e_3
60. Intersect(c_3, e_3) → D_1, C_8, ,
61. Intersect(c_1, d_1, 2) → C_6
62. Center(c_1) → W
63. Center(d_1) → Z
64. Center(e_1) → F_1
65. Segment(F_1, B) → k_2
66. Segment(W, C) → l_2
67. Segment(A, Z) → m_2
68. Intersect(m_2, k_2) → C_5
69. Segment(P_1, P_2) → b_3
70. Segment(P_2, P_6) → f_3
71. Line(P_1, P_2) → a_3
72. Line(P_2, P_8) → g_3
73. Line(P_2, P_6) → h_3