三角形中线演示

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. Polygon(D, E, F) → poly2, f, d, e
3. midtri(F, D, E) → G, H, I, poly3
4. midtri(I, G, H) → J, K, L, poly4
5. midtri(K, L, J) → M, N, O, poly5
6. midtri(N, O, M) → P, Q, R, poly6
7. Line(A, H) → i
8. Line(B, I) → j
9. Line(C, G) → k
10. Angle(F, A, E) → α
11. Angle(C, B, A) → β
12. Angle(A, C, B) → γ
13. Angle(E, D, F) → δ
14. Angle(F, E, D) → ε
15. Angle(D, F, E) → ζ
16. Angle(C, D, E) → η
17. Angle(D, E, C) → θ
18. Angle(E, F, A) → ι
19. Angle(A, E, F) → κ
20. Angle(B, F, D) → λ
21. Angle(F, D, B) → μ
22. Line(S, A) → m
23. Line(S, C) → n
24. Line(S, B) → p
25. Intersect(p, b) → T
26. Distance(A, T) → distanceAT
27. Distance(T, C) → distanceTC
28. Intersect(m, a) → U
29. Intersect(n, c) → V
30. Distance(A, V) → distanceAV
31. Distance(V, B) → distanceVB
32. Distance(B, U) → distanceBU
33. Distance(U, C) → distanceUC
34. OrthogonalLine(S, b) → q
35. OrthogonalLine(S, c) → r
36. OrthogonalLine(S, a) → s
37. Intersect(s, a) → W
38. Intersect(q, b) → Z
39. Intersect(r, c) → A_1
40. Segment(A_1, S) → t
41. Segment(W, S) → a_1
42. Segment(Z, S) → b_1
43. Angle(S, A_1, A) → ν
44. Angle(C, W, S) → ξ
45. Angle(A, Z, S) → ο
46. Midpoint(a) → B_1
47. Midpoint(c) → C_1
48. Midpoint(b) → D_1
49. OrthogonalLine(C_1, c) → c_1
50. OrthogonalLine(D_1, b) → d_1
51. OrthogonalLine(B_1, a) → e_1
52. Intersect(c_1, d_1) → E_1
53. Segment(E_1, B) → f_1
54. Segment(E_1, A) → g_1
55. Segment(E_1, C) → h_1
56. Circle(E_1, B) → k_1
57. AngularBisector(C, B, A) → i_1
58. AngularBisector(B, A, C) → j_1
59. AngularBisector(A, C, B) → l_1
60. Intersect(i_1, j_1) → F_1
61. Angle(F_1, C, B) → ρ
62. Angle(A, C, F_1) → σ