第六步：滑动条与轨迹演示

GeoGebra 命令及参数

1. Line(A, B) → a
2. OrthogonalLine(B, a) → b
3. OrthogonalLine(A, a) → c
4. Point(b) → C
5. OrthogonalLine(C, c) → d
6. Intersect(c, d) → D
7. Segment(D, C) → e
8. Segment(C, B) → f
9. Segment(B, A) → g
10. Segment(A, D) → h
11. Angle(A, B, C) → α
12. Angle(C, D, A) → β
13. Angle(D, A, B) → γ
14. Angle(B, C, D) → δ
15. Segment(D, E) → i
16. Segment(E, F) → j
17. Segment(F, G) → k
18. Segment(G, H) → l
19. Segment(H, I) → m
20. Segment(I, J) → n
21. Segment(J, K) → p
22. Segment(K, L) → q
23. Segment(L, M) → r
24. Segment(M, C) → s
25. Vector(C, B) → u
26. Translate(D, u) → D'
27. Translate(E, u) → E'
28. Segment(D', E') → i'
29. Translate(E, u) → E'_1
30. Translate(F, u) → F'
31. Segment(E'_1, F') → j'
32. Translate(F, u) → F'_1
33. Translate(G, u) → G'
34. Segment(F'_1, G') → k'
35. Translate(G, u) → G'_1
36. Translate(H, u) → H'
37. Segment(G'_1, H') → l'
38. Translate(H, u) → H'_1
39. Translate(I, u) → I'
40. Segment(H'_1, I') → m'
41. Translate(I, u) → I'_1
42. Translate(J, u) → J'
43. Segment(I'_1, J') → n'
44. Translate(J, u) → J'_1
45. Translate(K, u) → K'
46. Segment(J'_1, K') → p'
47. Translate(K, u) → K'_1
48. Translate(L, u) → L'
49. Segment(K'_1, L') → q'
50. Translate(L, u) → L'_1
51. Translate(M, u) → M'
52. Segment(L'_1, M') → r'
53. Translate(M, u) → M'_1
54. Translate(C, u) → C'
55. Segment(M'_1, C') → s'
56. Segment(D, N) → t
57. Segment(N, O) → a_1
58. Segment(O, P) → b_1
59. Segment(P, Q) → c_1
60. Segment(Q, R) → d_1
61. Segment(R, S) → e_1
62. Segment(S, T) → f_1
63. Segment(T, U) → g_1
64. Segment(U, V) → h_1
65. Segment(V, W) → i_1
66. Segment(W, Z) → j_1
67. Segment(Z, A) → k_1
68. Vector(A, B) → v
69. Translate(D, v) → D'_1
70. Translate(N, v) → N'
71. Segment(D'_1, N') → t'
72. Translate(N, v) → N'_1
73. Translate(O, v) → O'
74. Segment(N'_1, O') → l_1
75. Translate(O, v) → O'_1
76. Translate(P, v) → P'
77. Segment(O'_1, P') → m_1
78. Translate(P, v) → P'_1
79. Translate(Q, v) → Q'
80. Segment(P'_1, Q') → n_1
81. Translate(Q, v) → Q'_1
82. Translate(R, v) → R'
83. Segment(Q'_1, R') → p_1
84. Translate(R, v) → R'_1
85. Translate(S, v) → S'
86. Segment(R'_1, S') → q_1
87. Translate(S, v) → S'_1
88. Translate(T, v) → T'
89. Segment(S'_1, T') → r_1
90. Translate(T, v) → T'_1
91. Translate(U, v) → U'
92. Segment(T'_1, U') → s_1
93. Translate(U, v) → U'_1
94. Translate(V, v) → V'
95. Segment(U'_1, V') → t_1
96. Translate(V, v) → V'_1
97. Translate(W, v) → W'
98. Segment(V'_1, W') → a_2
99. Translate(W, v) → W'_1
100. Translate(Z, v) → Z'
101. Segment(W'_1, Z') → b_2
102. Translate(Z, v) → Z'_1
103. Translate(A, v) → A'
104. Segment(Z'_1, A') → c_2
105. Translate(D', v) → D''