维纳斯标志的几何构造

维纳斯标志的几何构造
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2020-07-23 22:59
①这个范例演示了如何通过几何构造创建维纳斯标志的图形;②涉及的核心数学概念包括角度、反射、等边三角形、直角三角形、条件概率和勾股定理;③作图要点——从下方『构造摘要』提炼用到了LineBisector(角平分线)、Vector(向量)、OrthogonalVector(正交向量)、Line(直线)、OrthogonalLine(垂直线)、Intersect(交点)、Mirror(镜像)、Midpoint(中点)、Polygon(多边形)、CircleArc(圆弧)、Segment(线段)等GeoGebra命令/对象;④适合高中数学教学或几何作图爱好者学习。

GeoGebra 命令及参数

  1. LineBisector(A, B) → m
  2. Vector(A, B) → u
  3. OrthogonalVector(u) → v
  4. LineBisector(A_1, A) → l
  5. Line(A, B) → s
  6. OrthogonalLine(D, s) → i
  7. OrthogonalLine(A, s) → b
  8. OrthogonalLine(A_1, b) → r
  9. OrthogonalLine(F, b) → f
  10. Intersect(m, f) → M
  11. Mirror(f, l) → f'
  12. Intersect(i, f') → E
  13. OrthogonalLine(K, r) → h
  14. Midpoint(K, G) → O
  15. Line(O, R) → t
  16. Line(I, t) → a
  17. Line(V, a) → c
  18. Intersect(c, i) → C_1
  19. Line(M, c) → d
  20. Line(Q, d) → g_1
  21. Line(Z, g_1) → h_1
  22. Intersect(i, h_1) → B_1
  23. OrthogonalLine(B_1, b) → i_1
  24. LineBisector(B_1, O_1) → n_2
  25. Intersect(n_2, i) → S_1
  26. LineBisector(S_1, C_1) → j_5
  27. Intersect(n_2, j_5) → Z_2
  28. OrthogonalLine(B, u, xOyPlane) → g
  29. Mirror(i, m) → i'
  30. Intersect(g, r) → C
  31. Mirror(f, l) → f'_1
  32. Mirror(F, l) → F'
  33. Intersect(m, f') → S
  34. Polygon(A_1, C, B, A) → c4, a_1, c_3, b_2, a_2
  35. Intersect(i', f') → W
  36. OrthogonalLine(G, f'_1) → k
  37. OrthogonalLine(H, f'_1) → j
  38. OrthogonalLine(N, r) → p
  39. OrthogonalLine(J, f'_1) → q
  40. OrthogonalLine(T, f'_1) → n
  41. Line(T, t) → e
  42. Line(L, a) → f_1
  43. Intersect(n, d) → D_1
  44. Intersect(g_1, n) → E_1
  45. Intersect(p, e) → F_1
  46. Intersect(h, f') → G_1
  47. Intersect(h, f_1) → H_1
  48. Intersect(j, a) → I_1
  49. Intersect(j, f_1) → J_1
  50. Intersect(k, f_1) → K_1
  51. Intersect(j, c) → L_1
  52. Intersect(k, c) → N_1
  53. Polygon(I, I_1, H_1, L, J_1, K_1, N_1, L_1, M_1, C_1, B_1, O_1) → polígono1, i_2, o_1, q_1, l_2, j_1, k_1, l_1, n_1, m_1, p_1, c_1, b_1
  54. OrthogonalLine(F_1, i') → r_1
  55. Polygon(Q_1, Q, F_1, P_1, M, D_1, E_1, L_1, I_1, T, O, R) → polígono2, s_1, r_2, h_2, j_2, q_2, m_2, d_1, t_1, f_2, g_2, t_2, o
  56. LineBisector(L, H_1) → k_2
  57. Intersect(k_2, i) → R_1
  58. CircleArc(R_1, H_1, L) → c_2
  59. LineBisector(E_1, L_1) → p_2
  60. Intersect(p_2, h) → T_1
  61. CircleArc(T_1, E_1, L_1) → s_2
  62. LineBisector(T, I_1) → f_3
  63. Intersect(f_3, i) → U_1
  64. CircleArc(U_1, I_1, T) → d_3
  65. LineBisector(P_1, F_1) → g_3
  66. Intersect(p, g_3) → V_1
  67. CircleArc(V_1, F_1, P_1) → e_3
  68. LineBisector(Q, Q_1) → h_3
  69. Intersect(h_3, i_1) → W_1
  70. CircleArc(W_1, Q_1, Q) → k_3
  71. Intersect(q, h_1) → Z_1
  72. Intersect(q, c) → A_2
  73. Polygon(Z_1, Z, V, A_2) → c1, z_1, z_2, v_1, i_3
  74. Segment(T, I_1) → j_3
  75. Segment(L, H_1) → l_3
  76. Segment(B_1, O_1) → m_3
  77. Segment(Q, Q_1) → n_3
  78. Segment(E_1, L_1) → p_3
  79. Mirror(Z_1, m) → B_2
  80. Mirror(Z, m) → Z'
  81. Mirror(V, m) → V'
  82. Mirror(A_2, m) → C_2
  83. Polygon(B_2, Z', V', C_2) → c1', q_3, z', v', r_3
  84. Mirror(c_2, m) → s_3
  85. CircleArc(Z_2, B_1, O_1) → d_2
  86. Mirror(d_2, m) → t_3
  87. Mirror(d_3, m) → c_4
  88. Mirror(e_3, m) → d_4
  89. Mirror(k_3, m) → e_4
  90. Mirror(s_2, m) → f_4
  91. Mirror(I, m) → I'
  92. Mirror(I_1, m) → D_2
  93. Mirror(J_1, m) → E_2
  94. Mirror(K_1, m) → F_2
  95. Mirror(N_1, m) → G_2
  96. Mirror(L_1, m) → H_2
  97. Mirror(M_1, m) → I_2
  98. Mirror(C_1, m) → J_2
  99. Mirror(B_1, m) → K_2
  100. Mirror(O_1, m) → L_2
  101. Mirror(H_1, m) → M_2
  102. Mirror(L, m) → L'
  103. Polygon(I', D_2, M_2, L', E_2, F_2, G_2, H_2, I_2, J_2, K_2, L_2) → polígono1', b_3, p_4, q_4, l', g_4, h_4, i_4, j_4, k_4, l_4, m_4, n_4
  104. Mirror(Q_1, m) → N_2
  105. Mirror(Q, m) → Q'
  106. Mirror(M, m) → M'
  107. Mirror(D_1, m) → O_2
  108. Mirror(E_1, m) → P_2
  109. Mirror(L_1, m) → Q_2
  110. Mirror(I_1, m) → R_2
  111. Mirror(T, m) → T'
  112. Mirror(O, m) → O'
  113. Mirror(R, m) → R'
  114. Mirror(F_1, m) → S_2
  115. Mirror(P_1, m) → T_2
  116. Polygon(N_2, Q', S_2, T_2, M', O_2, P_2, Q_2, R_2, T', O', R') → polígono2', r_4, r', b_4, f_5, q', m', o_2, s_4, t_4, a_4, t', o'
  117. Segment(F_2, R_2) → g_5
  118. Segment(R_2, T') → h_5
  119. Polygon(U_2, R, F_1) → t1, i_5, u_2, r_5
  120. Mirror(U_2, m) → V_2
  121. Mirror(R, m) → R'_1
  122. Mirror(F_1, m) → W_2
  123. Polygon(V_2, R'_1, W_2) → t1', w_2, v_2, r'_1
  124. Segment(B_1, O_1) → k_5
  125. Mirror(Q, m) → Q'_1
  126. Mirror(Q_1, m) → A_3
  127. Segment(Q'_1, A_3) → l_5