三角形特殊线段与外接圆动态演示

GeoGebra 命令及参数

1. Rotate(C, (a * π / 180), A) → A'
2. Ray(A, A') → g
3. Point(g) → B
4. Segment(B, C) → h
5. Segment(A, B) → i
6. Point(i) → D
7. Segment(A, C) → f
8. Line(D, f) → j
9. Intersect(j, h) → E
10. Segment(E, C) → m
11. Line(B, A) → k
12. Point(h) → F
13. Angle(C, A, A') → α
14. Polygon(A, C, B) → t1, c_1, b, a_1
15. Polygon(D, E, F) → t2, f_1, d_1, e
16. Segment(D, F) → l
17. Circle(B, 2) → p
18. Circle(A, 2) → q
19. Intersect(p, k, 1) → H
20. Intersect(q, k, 2) → I
21. Ray(B, H) → n
22. Ray(A, I) → r
23. LineBisector(E, F) → s
24. LineBisector(E, D) → t
25. Segment(D, B) → g_1
26. Segment(D, A) → h_1
27. Min(g_1, h_1) → o
28. Circle(A, (0.3 * o)) → e_1
29. Circle(D, (0.3 * o)) → k_1
30. Intersect(e_1, k) → K, L
31. LineBisector(C, F) → j_1
32. Dilate(D, If[0 < u ≤ 1, 1 - u, 0], E) → D'
33. Segment(D, D') → l_1
34. Rotate(K, If[1 < u ≤ 2, ((-(u - 1)) * α), (-α)], A) → K'
35. CircleSector(A, K', K) → p_1
36. Dilate(A, If[2 < u ≤ 3, 3 - u, 0], D) → B'
37. Vector(A, B') → v
38. Translate(p_1, v) → q_1
39. Dilate(D, If[4 < u ≤ 5, 5 - u, 0], F) → D'_1
40. Segment(D, D'_1) → m_1
41. Ray(D, A) → n_1
42. LineBisector(E, F) → c
43. LineBisector(F, D) → d
44. LineBisector(F, C) → t_1
45. LineBisector(D, E) → i_1
46. LineBisector(F, D) → r_1
47. Intersect(r_1, i_1) → G_1
48. Circle(G_1, F) → s_1
49. LineBisector(F, C) → f_2
50. Intersect(s_1, k) → G, J
51. LineBisector(J, A) → b_1
52. LineBisector(C, F) → g_2
53. Intersect(g_2, b_1) → M
54. Circle(M, C) → c_2
55. Ray(D, B) → h_2
56. Intersect(s_1, h_2) → N, O
57. LineBisector(O, A) → i_2
58. LineBisector(C, F) → j_2
59. Intersect(i_2, j_2) → P
60. Circle(P, C) → d_2
61. Dilate(G_1, If[6 < u ≤ 7, 7 - u, 0], F) → Q
62. Segment(G_1, Q) → k_2
63. Circle(G_1, Q) → e_2
64. Dilate(P, If[8.5 < u ≤ 9.5, 9.5 - u, 0], C) → P'
65. Segment(P, P') → l_2
66. Circle(P, P') → p_2
67. Dilate(M, If[8.5 < u ≤ 9.5, 9.5 - u, 0], C) → M'
68. Segment(M, M') → m_2
69. Circle(M, M') → q_2