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Pyramid Unfolded

Pyramid Unfolded
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2018-09-16 12:38
VectorSolid GeometryGeometric Construction
This example demonstrates the unfolded view of a pyramid. Key mathematical concepts include solid geometry and geometric construction. Using GeoGebra commands such as Line, Circle, Intersect, Vector, Translate, etc., the unfolded view of a pyramid can be constructed. Suitable for students at junior high school level and above.

GeoGebra Commands & Parameters

  1. Line(J, K) → h
  2. Circle(J, width) → g
  3. Intersect(g, h, 1) → M
  4. Vector(J, M) → w
  5. Translate(A, Vector[w / 2]) → C
  6. Dilate(I, length, H) → L
  7. Vector(H, L) → v
  8. Translate(C, v) → D
  9. Midpoint(C, D) → Q_1
  10. Translate(A, v) → B
  11. Midpoint(A, B) → Y
  12. Line(Y, Q_1) → g_1
  13. Midpoint(C, B) → N
  14. Circle(Q_1, N) → k_1
  15. Intersect(k_1, g_1, 2) → V_1
  16. Dilate(F, height, E) → G
  17. Vector(E, G) → u
  18. Translate(N, u) → O
  19. Polygon(A, B, D, C) → P, a, b, d, c
  20. Polygon(O, C, D) → Q, d_1, o, c_1
  21. Polygon(O, A, C) → R, c_2, o_1, a_1
  22. Polygon(O, D, B) → S, b_1, o_2, d_2
  23. Polygon(O, A, B) → T, b_2, o_3, a_2
  24. Midpoint(B, D) → U
  25. Segment(O, N) → e
  26. Segment(O, U) → f
  27. Midpoint(O, U) → W
  28. Midpoint(O, N) → V
  29. If(height ≤ 5, C) → Z
  30. Segment(Z, O) → i
  31. Segment(Z, A) → j
  32. Line(N, U) → k
  33. Intersect(k, c) → E_1
  34. OrthogonalLine(E_1, k) → l
  35. OrthogonalLine(U, k) → m
  36. Circle(E_1, width / 2) → p
  37. Intersect(p, l, 2) → F_1
  38. OrthogonalLine(F_1, l) → n
  39. Intersect(p, l, 1) → G_1
  40. OrthogonalLine(G_1, l) → q
  41. Intersect(m, n) → H_1
  42. Intersect(m, q) → I_1
  43. Midpoint(F_1, H_1) → J_1
  44. Midpoint(I_1, G_1) → K_1
  45. Line(J_1, K_1) → r
  46. Circle(E_1, A1) → s
  47. Midpoint(H_1, I_1) → L_1
  48. Circle(U, A1) → t
  49. Intersect(s, k, 1) → M_1
  50. Intersect(t, k, 2) → N_1
  51. Circle(J_1, A2) → e_1
  52. Circle(K_1, A2) → f_1
  53. Intersect(e_1, r, 1) → O_1
  54. Intersect(f_1, r, 2) → P_1
  55. Vector(O, M_1) → z_1
  56. Vector(O, N_1) → i_1
  57. Midpoint(Q_1, N) → R_1
  58. Midpoint(Y, N) → S_1
  59. Circle(S_1, O) → q_1
  60. Intersect(q_1, g_1, 1) → T_1
  61. Vector(T_1, P_1) → u_1
  62. Vector(O, T_1) → w_1
  63. Vector(A, G_1) → l_1
  64. Vector(B, I_1) → n_1
  65. Vector(D, H_1) → r_1
  66. Circle(V_1, O) → h_1
  67. Vector(C, F_1) → s_1
  68. Intersect(h_1, g_1, 2) → U_1
  69. Vector(O, U_1) → z
  70. Vector(U_1, O_1) → j_1
  71. CircleArc(S_1, O, T_1) → p_1
  72. CircleArc(V_1, U_1, O) → t_1
  73. CircumcircleArc(M_1, O, N_1) → e_2
  74. Center(e_2) → W_1
  75. Translate(O, Vector[(w_1 * m_1)]) → O'
  76. Translate(O, Vector[(z_1 * (m_1 - 1))]) → O'_1
  77. Translate(O, Vector[(z * (m_1 - 2))]) → O'_2
  78. Translate(O, Vector[(i_1 * (m_1 - 3))]) → O'_3
  79. Translate(T_1, Vector[(u_1 * (m_1 - 4))]) → Z_1
  80. Translate(U_1, Vector[(j_1 * (m_1 - 4))]) → A_2
  81. Ray(S_1, O') → f_2
  82. Intersect(p_1, f_2, 1) → C_2
  83. If(m_1 ≤ 0, O, If[m_1 < 1, C_2, If[m_1 < 4, T_1, If[m_1 < 5, Z_1, P_1]]]) → B_2
  84. Ray(W_1, O'_1) → g_2
  85. Intersect(e_2, g_2, 1) → D_2
  86. If(m_1 ≤ 1, O, If[m_1 < 2, D_2, M_1]) → E_2
  87. Ray(W_1, O'_3) → h_2
  88. Intersect(e_2, h_2, 1) → F_2
  89. If(m_1 ≤ 3, O, If[m_1 < 4, F_2, N_1]) → G_2
  90. Ray(V_1, O'_2) → i_2
  91. Intersect(t_1, i_2, 1) → H_2
  92. If(m_1 ≤ 2, O, If[m_1 < 3, H_2, If[m_1 < 4, U_1, If[m_1 < 5, A_2, O_1]]]) → I_2
  93. Translate(A, Vector[(l_1 * (m_1 - 4))]) → A'
  94. Translate(B, Vector[(n_1 * (m_1 - 4))]) → B'
  95. Translate(D, Vector[(r_1 * (m_1 - 4))]) → D'
  96. Translate(C, Vector[(s_1 * (m_1 - 4))]) → C'
  97. If(m_1 ≤ 4, A, If[m_1 < 5, A', G_1]) → J_2
  98. If(m_1 ≤ 4, C, If[m_1 < 5, C', F_1]) → K_2
  99. If(m_1 ≤ 4, D, If[m_1 < 5, D', H_1]) → L_2
  100. If(m_1 ≤ 4, B, If[m_1 < 5, B', I_1]) → M_2
  101. Polygon(E_2, K_2, J_2) → poly1, j_2, e_3, k_2
  102. Polygon(J_2, M_2, B_2) → poly2, b_3, j_3, m_2
  103. Polygon(M_2, G_2, L_2) → poly3, l_2, m_3, g_3
  104. Polygon(L_2, I_2, K_2) → poly4, k_3, l_3, i_3
  105. Polygon(K_2, J_2, M_2, L_2) → poly5, k_4, j_4, m_4, l_4
  106. Segment(U, G_2) → n_2
  107. Midpoint(U, G_2) → N_2
  108. Midpoint(O, U) → O_2
  109. Vector(P_2, N_2) → u_2
  110. Vector(P_2, O_2) → v_2
  111. Segment(N, O) → p_2
  112. Midpoint(O, N) → Q_2
  113. Segment(A, O) → q_2
  114. Segment(B, O) → r_2
  115. Segment(D, O) → t_2
  116. Segment(C, O) → a_3
  117. Segment(U, O) → c_3
  118. Midpoint(K_2, L_2) → R_2
  119. Segment(R_2, A_2) → d_3
  120. Midpoint(Q_2, I_2) → S_2
  121. Vector(T_2, S_2) → w_2
  122. Segment(J_2, K_2) → f_3

AI Drawing Prompt Reference

Draw an unfolded view of a pyramid. Start with a rectangular base, then construct a semicircle along one side to determine the position of a lateral triangle. Translate the base vertices by specific vectors to form the unfolded triangular faces, connecting them in sequence. Add auxiliary lines near the base center to locate the apex, and draw segments from the apex to the base edges. Finally, include a circular auxiliary figure beside the base to illustrate the unfolding process. The final image shows the rectangular base, four triangular faces, auxiliary segments, and a circle, demonstrating the geometric relationship between the solid and its net.
The prompt above was compiled from the original drawing commands and is for reference only.