平行线等分线段定理演示

GeoGebra 命令及参数

1. Line(A, B) → a_1
2. Circle(A, a) → c
3. OrthogonalLine(A, a_1) → b
4. Intersect(c, b, 1) → C
5. OrthogonalLine(C, b) → d
6. Intersect(c, b) → D, E
7. OrthogonalLine(E, b) → e
8. Circle(E, a) → f
9. Intersect(f, b, 2) → F
10. OrthogonalLine(F, b) → g
11. Circle(C, a) → h
12. Intersect(h, b) → G, H
13. OrthogonalLine(G, b) → i
14. Distance(F, E) → distanceFE
15. Distance(E, A) → distanceEA
16. Distance(A, C) → distanceAC
17. Distance(C, G) → distanceCG
18. Point(b) → I
19. Point(b) → J
20. Point(g) → K
21. Point(i) → L
22. Line(K, L) → j
23. Intersect(e, j) → O
24. Intersect(a_1, j) → P
25. Intersect(d, j) → Q
26. Segment(K, O) → k
27. Segment(O, P) → l
28. Segment(P, Q) → m
29. Segment(Q, L) → n
30. Point(g) → M
31. Point(i) → N
32. Segment(M, N) → p
33. Intersect(e, p) → R
34. Intersect(a_1, p) → S
35. Intersect(d, p) → T
36. Segment(M, R) → q
37. Segment(R, S) → r
38. Segment(S, T) → s
39. Segment(T, N) → t
40. Circle(N, 3) → c_1
41. Circle(T, 3) → d_1
42. Circle(S, 3) → e_1
43. Circle(R, 3) → f_1
44. Intersect(f_1, e, 1) → U
45. Intersect(f_1, q, 1) → V
46. Intersect(e_1, a_1, 2) → W
47. Intersect(e_1, r, 1) → Z
48. Intersect(d_1, d, 1) → A_1
49. Intersect(d_1, s, 1) → B_1
50. Intersect(c_1, i, 1) → C_1
51. Intersect(c_1, t, 1) → D_1
52. CircleSector(R, U, V) → g_1
53. CircleSector(S, W, Z) → h_1
54. CircleSector(T, A_1, B_1) → k_1
55. CircleSector(N, C_1, D_1) → p_1