三角锥的竖直截面动态演示

GeoGebra 命令及参数

1. Point(xAxis) → C
2. Point(zAxis) → D
3. Pyramid(A, B, C, D) → a, faceABC, edgeCD, faceABD_1, faceBCD, faceACD, edgeAB, edgeBC, edgeAC, edgeAD, edgeBD
4. Pyramid(faceABD_1, A) → b, faceAAB, faceABD, faceAAD, edgeAA, edgeAB, edgeAD
5. Intersect(edgeAC, yAxis) → E
6. Intersect(edgeBC, yAxis) → F
7. Point(edgeAC) → G
8. Point(edgeBC) → H
9. Point(edgeCD) → I
10. Point(edgeBD) → L
11. Point(edgeAD) → M
12. Point(edgeBC) → N
13. Plane(L, M, N) → r
14. IntersectPath(r, faceABD) → g
15. Intersect(r, faceABD) → O, P
16. IntersectPath(r, faceACD) → f
17. Intersect(r, faceACD) → J, K
18. IntersectPath(r, faceBCD) → h
19. Intersect(r, faceBCD) → Q, R
20. IntersectPath(r, a) → poly1, S, T, U, V, i, j, k, l
21. Plane(G, H, I) → p
22. IntersectPath(p, faceACD) → m
23. Intersect(p, faceACD) → W, Z
24. IntersectPath(p, a) → poly2, A_1, B_1, C_1, n, q, s
25. IntersectPath(xOyPlane, faceBCD) → t
26. Intersect(xOyPlane, faceBCD) → D_1, E_1
27. Plane(E, D, F) → p_1
28. IntersectPath(p_1, a) → poly3, F_1, G_1, H_1, c, d, e
29. Point(edgeCD) → I_1
30. Point(t) → J_1
31. Point(edgeAC) → K_1
32. Plane(I_1, J_1, K_1) → q_1
33. IntersectPath(q_1, faceBCD) → f_1
34. Intersect(q_1, faceBCD) → L_1, M_1
35. IntersectPath(q_1, a) → poly4, N_1, O_1, P_1, g_1, h_1, i_1
36. Point(t) → Q_1
37. Point(edgeAC) → R_1
38. Plane(L, M, N) → r_1
39. Point(yAxis) → S_1
40. Plane(F, D, S_1) → p_2
41. IntersectPath(p_2, a) → poly5, T_1, U_1, V_1, j_1, k_1, l_1
42. PointIn(faceABD) → W_1
43. Plane(Q_1, R_1, W_1) → q_2
44. IntersectPath(q_2, b) → poly6, Z_1, A_2, m_1, n_1
45. IntersectPath(q_2, a) → poly7, B_2, C_2, D_2, E_2, s_1, t_1, a_1, b_1