圆内接四边形 by adrian Swenson

GeoGebra 命令及参数

1. Circle(A, B) → c
2. Point(c) → C
3. Point(c) → D
4. Point(c) → E
5. Point(c) → F
6. Polygon(C, D, E, F) → q1, c_1, d, e, f
7. Segment(C, E) → g
8. Segment(F, D) → h
9. Midpoint(C, D) → G
10. Midpoint(D, E) → H
11. Midpoint(E, F) → I
12. Midpoint(F, C) → J
13. Segment(F, H) → i
14. Segment(F, G) → j
15. Segment(C, I) → k
16. Segment(C, H) → l
17. Segment(D, J) → m
18. Segment(D, I) → n
19. Segment(E, G) → p
20. Segment(E, J) → q
21. Intersect(j, m) → K
22. Intersect(i, n) → L
23. Intersect(l, p) → M
24. Intersect(k, q) → N
25. Polygon(K, M, L, N) → q2, k_1, m_1, l_1, n_1
26. Circle(O, a) → r
27. Point(r) → P
28. Point(r) → Q
29. Point(r) → R
30. Point(r) → S
31. Polygon(P, Q, R, S) → q3, p_1, q_1, r_1, s
32. Segment(P, R) → t
33. Midpoint(p_1) → T
34. Midpoint(q_1) → U
35. Midpoint(r_1) → V
36. Midpoint(s) → W
37. Midpoint(t) → Z
38. Segment(Q, Z) → b
39. Segment(U, P) → f_1
40. Segment(P, V) → g_1
41. Segment(Z, S) → h_1
42. Segment(W, R) → i_1
43. Segment(R, T) → j_1
44. Intersect(b, f_1) → A_1
45. Intersect(g_1, h_1) → B_1
46. Segment(S, Q) → s_1
47. Midpoint(s_1) → C_1
48. Segment(Q, W) → t_1
49. Segment(C_1, P) → a_1
50. Segment(T, S) → b_1
51. Segment(Q, V) → d_1
52. Segment(R, C_1) → e_1
53. Segment(S, U) → f_2
54. Intersect(t_1, a_1) → D_1
55. Intersect(d_1, e_1) → E_1
56. Intersect(e_1, d_1) → F_1
57. Intersect(d_1, f_2) → G_1
58. Intersect(f_2, e_1) → H_1
59. Intersect(e_1, a_1) → I_1
60. Intersect(a_1, g_1) → J_1
61. Polygon(D_1, A_1, E_1, B_1) → q4, g_2, h_2, i_2, j_2
62. Area(q4) → o
63. Text(o) → text1
64. Area(q3) → u