正方形金字塔

正方形金字塔
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2017-05-05 00:32
这个范例演示了一个正方形金字塔的几何构造。它涉及正方形、立体几何等核心数学概念。通过使用GeoGebra命令如Point、Segment、Polygon、Pyramid等,可以构建金字塔的各个面和边。适合初中及以上学生学习立体几何。

GeoGebra 命令及参数

  1. Point(Circle[A, a]) → B
  2. Segment(A, B) → b
  3. Polygon(A, B, 4) → poly1, c, d, e, f, C, D
  4. Pyramid(poly1, (2 * a)) → g, E, faceABE, faceBCE, faceCDE, faceADE, edgeAE, edgeBE, edgeCE, edgeDE
  5. Net(g, h) → i, F, faceFGJ, faceGHK, faceHIL, faceFIM, edgeFG, edgeGH, edgeHI, edgeFI, edgeFJ, edgeGJ, G, edgeGK, edgeHK, edgeHL, edgeIL, edgeIM, edgeFM, H, I, J, K, L, M, faceFGHI
  6. Midpoint(A, H) → N
  7. Segment(E, N) → l
  8. Point(b) → O
  9. Segment(E, O) → m
  10. Segment(E, A) → n
  11. Segment(E, I) → p
  12. Segment(H, E) → q
  13. Segment(A, B) → r
  14. Segment(I, H) → s
  15. Segment(I, A) → t
  16. Segment(H, B) → f_1
  17. Segment(E, B) → g_1
  18. Segment(I, B) → h_1
  19. Intersect(d, e) → P
  20. Segment(A, H) → i_1
  21. Midpoint(f) → Q
  22. Segment(E, Q) → j_1
  23. Segment(N, Q) → k_1
  24. Segment(N, A) → l_1
  25. Segment(H, N) → m_1