相似三角形几何演示

GeoGebra 命令及参数

1. Mirror(G, F) → G'
2. Ray(F, G') → l
3. Point(l) → J
4. Line(H, F) → n_2
5. Polygon(F, G, H) → poly2, h_1, f_1, g_1
6. Line(J, f_1) → m_2
7. Intersect(n_2, m_2) → B_1
8. Line(A, B) → b_1
9. Polygon(C, A, B) → poly1, b, c, a_2
10. Ray(A, C) → g
11. Point(g) → D
12. Line(D, a_2) → l_2
13. Intersect(b_1, l_2) → A_1
14. Ray(A, B) → f
15. Segment(D, A) → h
16. Segment(E, A) → i
17. Segment(D, E) → j
18. Mirror(H, F) → H'
19. Ray(F, H') → k
20. Segment(I, F) → m
21. Segment(F, J) → n
22. Segment(J, I) → p
23. Polygon(A, D, E) → poly3, e, a_1, d
24. Polygon(F, J, I) → poly4, i_1, f_2, j_1
25. Polygon(K, L, M) → poly5, m_1, k_1, l_1
26. Dilate(M, o, M) → M'
27. Dilate(K, o, Scale) → K'
28. Dilate(L, o, Scale) → L'
29. Dilate(M, o, Scale) → M'_1
30. Polygon(K', L', M'_1) → poly5', m'_1, k', l'
31. Segment(O, P) → q
32. Segment(O, Q) → r
33. Segment(P, Q) → s
34. Dilate(O, 1 / 3, Q) → O'
35. Line(O', s) → t
36. Intersect(q, t) → R
37. Segment(R, O') → n_1
38. Segment(O, O') → p_1
39. Segment(O', Q) → q_1
40. Segment(R, P) → r_1
41. Segment(R, O) → s_1
42. Line(A, C) → t_1
43. Line(F, p) → c_1
44. Line(G, m) → d_1
45. Intersect(d_1, c_1) → S
46. Line(T, U) → e_1
47. OrthogonalLine(T, e_1) → g_2
48. Point(g_2) → V
49. Point(e_1) → W
50. Segment(V, W) → h_2
51. Segment(W, T) → i_2
52. Segment(T, V) → j_2
53. OrthogonalLine(T, h_2) → k_2
54. Intersect(h_2, k_2) → Z
55. Angle(T, V, Z) → α
56. Angle(V, Z, T) → β
57. Angle(T, W, Z) → γ
58. Angle(T, Z, W) → δ
59. Angle(W, T, Z) → ε
60. Angle(V, T, Z) → ζ
61. Angle(poly3) → η, θ, ι
62. Angle(poly3) → κ, λ, μ
63. Angle(poly3) → ν, ξ, ο
64. Angle(A, B, C) → ρ
65. Angle(B, C, A) → σ
66. Perimeter(poly3) → perimeterpoly3
67. PointIn(poly3) → Pointpoly3_1
68. Perimeter(poly3) → u
69. PointIn(poly3) → Pointpoly3
70. Angle(B_1, F, J) → τ
71. Angle(G, F, H) → υ
72. Distance(m_1, k_1) → v