正多边形对称轴与旋转对称关系

正多边形对称轴与旋转对称关系
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2015-03-23 07:48
①本范例演示正多边形的对称轴与其旋转对称性的关系;②涉及核心数学概念包括对称性、旋转对称、正多边形几何性质;③作图要点运用了Point, Segment, Polygon, LineBisector, Intersect, Rotate, Circle等GeoGebra命令与对象;④适合高中数学教学与几何学习,用于直观理解正多边形的对称特性。

GeoGebra 命令及参数

  1. Point(Circle[A, Size]) → B
  2. Segment(A, B) → b
  3. Point(Circle[C, Size]) → D
  4. Segment(C, D) → c
  5. Point(Circle[E, Size]) → F
  6. Segment(E, F) → d
  7. Point(Circle[G, Size]) → H
  8. Segment(G, H) → e
  9. Point(Circle[I, Size]) → J
  10. Segment(I, J) → f
  11. Polygon(A, B, 3) → poly1, g, h, i, K
  12. Polygon(C, D, 4) → poly2, j, k, l, m, L, M
  13. Polygon(E, F, 5) → poly3, n, p, q, r, s, N, O, P
  14. Polygon(G, H, 6) → poly4, t, T, a_1, b_1, c_1, d_1, e_1, Q, R, S
  15. Polygon(I, J, 7) → poly5, f_1, W, Z, A_1, g_1, h_1, i_1, j_1, k_1, l_1, U, V
  16. LineBisector(l) → m_1
  17. LineBisector(k) → n_1
  18. LineBisector(r) → p_1
  19. LineBisector(q) → q_1
  20. LineBisector(p) → r_1
  21. LineBisector(d) → s_1
  22. LineBisector(s) → t_1
  23. Intersect(m_1, l) → B_1
  24. Intersect(n_1, k) → C_1
  25. Intersect(n_1, m) → D_1
  26. Intersect(m_1, c) → E_1
  27. Segment(B_1, E_1) → a_2
  28. Segment(C_1, D_1) → b_2
  29. Intersect(a_2, b_2) → F_1
  30. Intersect(l, a_2) → G_1
  31. Intersect(p_1, r) → H_1
  32. Intersect(q_1, q) → I_1
  33. Intersect(r_1, p) → J_1
  34. Intersect(s_1, d) → K_1
  35. Intersect(t_1, s) → L_1
  36. Intersect(p_1, q_1) → M_1
  37. Segment(F, H_1) → c_2
  38. Segment(O, K_1) → d_2
  39. Segment(N, L_1) → e_2
  40. Segment(P, J_1) → f_2
  41. Segment(E, I_1) → g_2
  42. LineBisector(j_1) → h_2
  43. LineBisector(i_1) → i_2
  44. LineBisector(h_1) → j_2
  45. LineBisector(g_1) → k_2
  46. LineBisector(f) → l_2
  47. LineBisector(l_1) → m_2
  48. LineBisector(k_1) → n_2
  49. Intersect(h_2, j_1) → N_1
  50. Intersect(i_2, i_1) → O_1
  51. Intersect(j_2, h_1) → P_1
  52. Intersect(k_2, g_1) → Q_1
  53. Intersect(h_2, i_2) → R_1
  54. Intersect(l_2, f) → S_1
  55. Intersect(m_2, l_1) → T_1
  56. Intersect(n_2, k_1) → U_1
  57. Segment(W, S_1) → p_2
  58. Segment(Q_1, Z) → q_2
  59. Segment(A_1, P_1) → r_2
  60. Segment(I, O_1) → s_2
  61. Segment(U, U_1) → t_2
  62. Segment(J, N_1) → a_3
  63. Segment(V, T_1) → b_3
  64. LineBisector(c_1) → c_3
  65. LineBisector(b_1) → d_3
  66. LineBisector(a_1) → e_3
  67. LineBisector(h) → f_3
  68. LineBisector(i) → g_3
  69. LineBisector(b) → h_3
  70. Intersect(f_3, h) → V_1
  71. Intersect(h_3, b) → W_1
  72. Intersect(g_3, i) → Z_1
  73. Intersect(e_3, d_1) → A_2
  74. Intersect(c_3, c_1) → B_2
  75. Intersect(d_3, b_1) → C_2
  76. Intersect(e_3, a_1) → D_2
  77. Intersect(c_3, e) → E_2
  78. Intersect(d_3, e_1) → F_2
  79. Intersect(f_3, g_3) → G_2
  80. Intersect(c_3, d_3) → H_2
  81. Segment(W_1, K) → i_3
  82. Segment(B, Z_1) → j_3
  83. Segment(A, V_1) → k_3
  84. Segment(E_2, B_2) → l_3
  85. Segment(F_2, C_2) → m_3
  86. Segment(Q, T) → n_3
  87. Segment(D_2, A_2) → p_3
  88. Segment(H, S) → q_3
  89. Segment(G, R) → r_3
  90. Rotate(poly1, α, G_2) → poly1'
  91. Rotate(poly2, α, F_1) → poly2'
  92. Rotate(poly3, α, M_1) → poly3'
  93. Rotate(poly4, α, H_2) → poly4'
  94. Rotate(poly5, α, R_1) → poly5'
  95. Intersect(l, m) → I_2
  96. Intersect(k, l) → J_2
  97. Segment(D, I_2) → s_3
  98. Segment(C, J_2) → t_3
  99. Intersect(d_1, p_3) → K_2
  100. Intersect(d_1, e_1) → L_2
  101. Intersect(r, s) → M_2
  102. Intersect(p, q) → N_2
  103. Intersect(q, r) → O_2
  104. Intersect(c_1, d_1) → P_2
  105. Intersect(b_1, c_1) → Q_2
  106. Intersect(a_1, b_1) → R_2
  107. Intersect(k_1, l_1) → S_2
  108. Intersect(j_1, k_1) → T_2
  109. Intersect(h_1, i_1) → U_2
  110. Intersect(g_1, h_1) → V_2
  111. Intersect(h, i) → W_2
  112. Circle(G_2, B) → c_4
  113. Circle(F_1, D) → d_4
  114. Circle(M_1, F) → e_4
  115. Circle(H_2, H) → f_4
  116. Circle(R_1, J) → g_4

AI 绘图提示语参考

绘制正多边形及其对称轴。首先绘制一个正三角形,接着绘制一个正方形、正五边形和正六边形、正七边形。然后找到每个正多边形的中心,并通过中心绘制对称轴。最后,连接对称轴的交点,形成新的线段,这些线段将帮助展示正多边形的对称性。
以上提示语为根据原始绘图命令整理而来,仅供参考。