多边形的内角

GeoGebra 命令及参数

1. Segment(B, C) → e
2. Segment(C, A) → f
3. Min(f, e) → m
4. Segment(A, B) → d
5. Min(d, f) → o
6. Min(m, o) → u
7. Polygon(A, B, C) → poly1, c, a, b
8. Ray(A, B) → h
9. Ray(B, C) → i
10. Ray(C, A) → j
11. Circle(C, (0.25 * u)) → p
12. Circle(A, (0.25 * u)) → q
13. Circle(B, (0.25 * u)) → r
14. Intersect(p, f) → D,
15. Intersect(p, e, 1) → E
16. Intersect(r, e, 1) → F
17. Intersect(r, d, 1) → G
18. Intersect(q, d, 1) → H
19. Intersect(q, f, 1) → I
20. Intersect(r, h, 2) → J
21. Intersect(q, j, 2) → K
22. Intersect(p, i, 2) → L
23. Midpoint(f) → M
24. Midpoint(e) → N
25. CircleSector(A, H, I) → s
26. CircleSector(B, F, G) → t
27. CircleSector(C, D, E) → c_1
28. Angle(A, C, B) → α
29. CircleSector(C, E, D) → d_1
30. CircleSector(A, I, H) → e_1
31. CircleSector(B, G, F) → f_1
32. Min(d, e) → n
33. Rotate(s, If[0 < l ≤ 1, (((-l) * 180))°, (-(180°))], M) → s'
34. Rotate(A, If[0 < l ≤ 1, (((-l) * 180))°, (-(180°))], M) → A'
35. Segment(M, A') → a_1
36. Rotate(H, (-(180°)), M) → H'
37. Line(H', C) → b_1
38. Rotate(B, If[0 < l ≤ 1, ((l * 180))°, 180°], N) → B'
39. Rotate(t, If[0 < l ≤ 1, ((l * 180))°, 180°], N) → t'
40. Segment(N, B') → g_1
41. Segment(C, M) → h_1
42. Segment(M, A) → i_1
43. Segment(C, N) → j_1
44. Segment(N, B) → k_1
45. Rotate(A, If[0 < l ≤ 1, ((l * 180))°, (-(180°))], M) → A'_1
46. Rotate(B, If[0 < l ≤ 1, (((-l) * 180))°, (-(180°))], N) → B'_1
47. Segment(N, B'_1) → l_1
48. Segment(M, A'_1) → m_1
49. Rotate(e_1, If[0 < l ≤ 1, ((l * 180))°, (-(180°))], M) → p_1
50. Rotate(f_1, If[0 < l ≤ 1, (((-l) * 180))°, (-(180°))], N) → q_1
51. CircleSector(C, L, D) → r_1
52. CircleSector(A, K, H) → s_1
53. CircleSector(B, J, F) → t_1
54. CircleSector(A, H, K) → c_2
55. CircleSector(B, F, J) → d_2
56. CircleSector(C, D, L) → e_2
57. Dilate(A, 1 - v, C) → A'_2
58. Dilate(B, 1 - v, C) → B'_2
59. Vector(A, A'_2) → w
60. Vector(B, B'_2) → u_1
61. Translate(s_1, w) → f_2
62. CircleArc(A, K, H) → g_2
63. Translate(t_1, u_1) → h_2
64. CircleArc(B, J, F) → k_2
65. Translate(c_2, w) → p_2
66. CircleArc(A, H, K) → q_2
67. Translate(d_2, u_1) → r_2
68. CircleArc(B, F, J) → s_2