正方体底四棱锥的截面 by nandrews

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(xAxis) → B
3. Polygon(A, B, 4) → poly1, a, b, c, d, C, D
4. Pyramid(poly1, 6) → e, E, faceABE, faceBCE, faceCDE, faceADE, edgeAE, edgeBE, edgeCE, edgeDE
5. Point(edgeBE) → F
6. Line(F, b) → f
7. Intersect(f, edgeCE) → G
8. OrthogonalLine(F, a, space) → g
9. OrthogonalLine(G, c, space) → h
10. Intersect(a, g) → H
11. Intersect(c, h) → I
12. Point(edgeBE) → J
13. OrthogonalPlane(J, edgeBE) → k
14. IntersectPath(k, e) → poly3, K, q, L, M, N, O, l, m, n, p
15. Point(edgeCE) → P
16. Line(P, b) → i
17. Intersect(i, edgeBE) → Q
18. Line(P, c) → r
19. Intersect(edgeDE, r) → R
20. Plane(Q, P, R) → s
21. IntersectPath(s, e) → poly2, S, T, U, V, t, a_1, b_1, c_1
22. OrthogonalLine(F, poly1) → d_1
23. Intersect(edgeBE, b) → W
24. Intersect(edgeDE, c) → Z
25. Segment(W, Z) → e_1
26. Intersect(e_1, d_1) → A_1
27. OrthogonalLine(F, e_1, space) → f_1
28. OrthogonalPlane(F, e_1) → v
29. IntersectPath(v, e) → poly4, B_1, C_1, D_1, g_1, h_1, i_1
30. Point(edgeBE) → E_1
31. Line(E_1, b) → j_1
32. Intersect(edgeCE, j_1) → F_1
33. OrthogonalLine(F_1, poly1) → k_1
34. Point(k_1) → G_1
35. Plane(E_1, F_1, G_1) → w
36. IntersectPath(w, e) → poly5, H_1, I_1, J_1, K_1, l_1, m_1, n_1, p_1