测量：九年级数学_面积：箭头的面积

GeoGebra 命令及参数

1. Segment(B_1, C) → a
2. Midpoint(a) → D
3. Circle(D, B_1) → c
4. Point(a) → E
5. Circle(D, E) → d
6. Tangent(B_1, c) → b,
7. Line(E, b) → e
8. Line(C, b) → f
9. Intersect(d, a) → A_1, F
10. Line(F, b) → g
11. Point(b) → G
12. Line(D, b) → i
13. Point(b) → L
14. Point(b) → H
15. Segment(H, G) → h
16. Point(h) → A
17. OrthogonalLine(A, h) → k
18. Point(b) → J
19. Segment(L, J) → j
20. Point(j) → B
21. OrthogonalLine(B, j) → l
22. Intersect(k, e) → M
23. Intersect(k, i) → N
24. Intersect(g, k) → O
25. Intersect(k, f) → P
26. Intersect(l, e) → Q
27. Intersect(l, i) → R
28. Intersect(l, g) → S
29. Intersect(l, f) → T
30. Segment(A, R) → m
31. Segment(P, R) → n
32. Segment(A, M) → p
33. Segment(P, O) → q
34. Segment(M, E) → r
35. Segment(E, F) → s
36. Segment(F, O) → t
37. Polygon(A, M, E, D, F, O, P, R) → poly1, i_1, m_1, e_1, d_1, f_1, o, p_1, r_1
38. Polygon(E, B_1, A, M) → Rectangle_1, e_2, b_1, i_2, m_2
39. Polygon(F, C, P, O) → Rectangle_2, f_2, c_1, p_2, o_1
40. Polygon(A, N, R, B) → poly4, i_3, n_1, r_2, k_1
41. Polygon(N, P, T, R) → poly5, n_2, p_3, t_1, r_3
42. Polygon(R, B, A) → Triangle_3, i_4, r_4, k_2
43. Polygon(P, R, T) → Triangle_4, t_2, p_4, r_5
44. Polygon(A, N, R) → Triangle_1, r_6, i_5, n_3
45. Polygon(N, P, R) → Triangle_2, r_7, n_4, p_5
46. Point(b) → I
47. OrthogonalLine(I, b) → a_1
48. Intersect(e, a_1) → K
49. Intersect(g, a_1) → U
50. Intersect(f, a_1) → V
51. Point(b) → W
52. OrthogonalLine(W, b) → g_1
53. Intersect(e, g_1) → Z
54. Intersect(g, g_1) → C_1
55. Intersect(f, g_1) → D_1
56. Segment(W, D_1) → h_1
57. Segment(I, K) → j_1
58. Segment(B_1, W) → l_1
59. Segment(C, D_1) → q_1
60. Segment(K, U) → s_1
61. Segment(U, V) → a_2
62. OrthogonalLine(B_1, b_1) → b_2
63. Point(b_2) → E_1
64. OrthogonalLine(E_1, b_2) → c_2
65. Intersect(c_2, k) → F_1
66. Point(k) → G_1
67. OrthogonalLine(G_1, k) → d_2
68. Intersect(d_2, l) → H_1
69. Segment(E_1, F_1) → g_2
70. Segment(G_1, H_1) → h_2
71. Polygon(E, M, O, F) → Rectangle_3, e_3, m_3, o_2, f_3
72. OrthogonalLine(R, i_4) → j_2
73. OrthogonalLine(B, i_4) → l_2
74. Point(l_2) → I_1
75. OrthogonalLine(I_1, l_2) → q_2
76. Intersect(q_2, j_2) → J_1
77. Segment(I_1, J_1) → s_2
78. Point(s_2) → K_1
79. Area(Rectangle_1) → u
80. Area(Rectangle_3) → v
81. Area(poly1) → w
82. Area(Triangle_1) → u_1