NBC标志的几何构造

GeoGebra 命令及参数

1. Vector(A, B) → u
2. OrthogonalVector(u) → n
3. Rotate(A, (-(33.5°)), D) → A'_4
4. Rotate(D, (-(33.5°)), D) → D'_4
5. Rotate(A, (-(33.5°)), D) → A'_2
6. Rotate(A'_2, (-(33.5°)), D) → E
7. Segment(A'_2, D'_4) → i'
8. OrthogonalLine(A'_2, i') → j
9. LineBisector(A, B) → f
10. Mirror(A'_2, f) → U
11. Intersect(f, j) → F
12. Vector(A'_2, F) → v
13. Vector(A'_2, G) → w
14. Translate(D'_4, w) → K
15. Translate(A'_2, w) → J
16. Translate(E, w) → E'
17. LineBisector(J, E') → k
18. Intersect(k, j) → L
19. Vector(K, L) → b
20. Vector(K, M) → c
21. Translate(A'_4, w) → H
22. Translate(H, c) → H'
23. Mirror(H', f) → H''_1
24. Vector(H''_1, U) → v_3
25. Midpoint(H''_1, U) → O_1
26. Segment(A, D) → g
27. Segment(A, D) → i
28. Polygon(A, D, A'_2) → t1, a'_2, a, d
29. Rotate(D, (-(33.5°)), D) → D'_5
30. Translate(D'_5, w) → I
31. Segment(J, K) → i''
32. Translate(I, c) → I'
33. Translate(E', c) → E''
34. Polygon(H', I', E'') → t1''', e'', l, m
35. Rotate(H', (-(33.5°)), M) → H''
36. Rotate(I', (-(33.5°)), M) → I''
37. Rotate(E'', (-(33.5°)), M) → E'''
38. OrthogonalLine(E'', l) → p
39. Intersect(f, p) → N
40. Vector(E'', N) → q
41. Vector(E'', O) → r
42. Translate(H'', r) → H'''
43. Translate(I'', r) → I'''
44. Translate(E''', r) → P
45. LineBisector(O, P) → s
46. Translate(M, r) → M'
47. Intersect(s, j) → Q
48. Vector(M', Q) → t
49. Vector(M', R) → u_1
50. Translate(H''', u_1) → S
51. Translate(I''', u_1) → T
52. Translate(P, u_1) → P'
53. Polygon(S, T, P') → t2'', p', s_1, t_1
54. Semicircle(A, A'_2) → e
55. Semicircle(H', E'') → h
56. Semicircle(S, P') → c_1
57. Mirror(S, f) → S'
58. Mirror(T, f) → T'
59. Mirror(P', f) → P''
60. Polygon(S', T', P'') → t2''', p'', s', t'
61. Mirror(c_1, f) → d_1
62. Mirror(I', f) → I''_1
63. Mirror(E'', f) → E'''_1
64. Polygon(H''_1, I''_1, E'''_1) → t2, e'''_1, h''_1, i''_1
65. Mirror(h, f) → h'
66. Mirror(A, f) → A'
67. Mirror(D, f) → D'
68. Polygon(A', D', U) → t1', u_2, a', d'
69. Mirror(e, f) → e'
70. Mirror(R, f) → R'
71. Mirror(M, f) → M'_1
72. Midpoint(P', P'') → V
73. Line(A_1, u) → f_1
74. Mirror(A_1, f) → B_1
75. Vector(E'''_1, H''_1) → v_1
76. Semicircle(W, C_1) → g_1
77. Vector(P'', S') → w_1
78. Semicircle(P', D_1) → h_1
79. Polygon(P', P'', R', M'_1, D', D, M, R) → polígono1, i_1, j_1, r', m'_1, k_1, d_2, m_1, r_1
80. Polygon(B_1, A_1, B, A) → c1, b_1, a_1, b_2, a_2
81. Polygon(M'_1, R', S', D_1, W, E'''_1) → polígono2, l_1, n_1, p_1, q_1, w_2, f_2
82. Polygon(M'_1, D', U, C_1, H''_1) → polígono3, g_2, h_2, u_3, i_2, j_2
83. Line(A'_2, P') → k_2
84. Line(E_1, k_2) → l_2
85. Intersect(l_2, j_1) → F_1
86. LineBisector(F_1, E_1) → m_2
87. Intersect(m_2, p'') → G_1
88. CircleArc(G_1, E_1, F_1) → c_2
89. Polygon(P'', F_1, E_1) → t3, n_2, p_2, q_2
90. Semicircle(O_1, A_1) → e_1
91. Mirror(e_1, f) → e_2
92. Mirror(g_1, f) → r_2
93. Mirror(h_1, f) → s_2
94. Mirror(M'_1, f) → H_1
95. Mirror(R', f) → R''
96. Mirror(S', f) → S''
97. Mirror(D_1, f) → I_1
98. Mirror(W, f) → W'
99. Mirror(E'''_1, f) → J_1
100. Polygon(H_1, R'', S'', I_1, W', J_1) → polígono2', t_2, r'', s'', f_3, w', g_3
101. Mirror(M'_1, f) → K_1
102. Mirror(D', f) → D''
103. Mirror(U, f) → U'
104. Mirror(C_1, f) → L_1
105. Mirror(H''_1, f) → M_1
106. Polygon(K_1, D'', U', L_1, M_1) → polígono3', h_3, d'', u', i_3, j_3
107. Semicircle(E'''_1, H''_1) → c_3
108. Semicircle(U, B) → d_3
109. Semicircle(P'', S') → e_3
110. Semicircle(E'''_1, H''_1) → k_3
111. Mirror(c_3, f) → p_3
112. Mirror(e_3, f) → q_3
113. Mirror(d_3, f) → r_3
114. Translate(p_3, Vector[(0.04 * b)]) → s_3
115. Mirror(s_3, f) → t_3
116. Translate(q_3, Vector[(0.03 * t)]) → c_4
117. Mirror(c_4, f) → d_4
118. Polygon(P', P'', F_1) → t4, l_3, m_3, n_3
119. Segment(F_1, R') → a_3
120. Midpoint(U, B) → N_1
121. Vector(D', N_1) → v_2
122. Translate(d_3, Vector[(0.03 * v_2)]) → e_4
123. Mirror(e_4, f) → f_4
124. Semicircle(F_1, P'') → g_4