梯形棱柱的截面 by Math Team - EnergyTech

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Polygon(A, B, C, D) → poly1, a, b, c, d
3. Prism(poly1, 4.228953535314572) → e, E, edgeAE, edgeBF, edgeCG, edgeDH, edgeEF, edgeFG, edgeGH, edgeEH, F, G, H, faceABFE, faceBCGF, faceCDHG, faceADHE, faceEFGH
4. Point(edgeFG) → I
5. OrthogonalLine(I, b, space) → f
6. OrthogonalLine(I, edgeEH, space) → g
7. Intersect(edgeEH, g) → J
8. Intersect(f, b) → K
9. OrthogonalLine(J, d, space) → h
10. Intersect(d, h) → L
11. Polygon(I, J, L, K) → poly2, i, j, l, k
12. Point(edgeCG) → M
13. OrthogonalLine(M, edgeBF, space) → n
14. Intersect(edgeBF, n) → N
15. OrthogonalLine(N, edgeAE, space) → p
16. Intersect(edgeAE, p) → O
17. OrthogonalLine(O, edgeDH, space) → q
18. Intersect(edgeDH, q) → P
19. Polygon(M, N, O, P) → poly3, m_1, n_1, o, p_1
20. Point(edgeCG) → Q
21. OrthogonalLine(Q, edgeBF, space) → s
22. Intersect(edgeBF, s) → R
23. Point(edgeDH) → S
24. Plane(R, Q, S) → t
25. IntersectPath(t, e) → poly4, T, U, V, W, a_1, b_1, c_1, d_1
26. Point(edgeGH) → Z
27. Point(edgeFG) → A_1
28. Point(edgeCG) → B_1
29. Plane(Z, A_1, B_1) → v
30. IntersectPath(v, e) → poly5, C_1, D_1, E_1, e_1, f_1, g_1
31. Intersect(edgeFG, edgeEF) → F_1
32. Point(edgeEH) → G_1
33. Segment(F_1, G_1) → h_1
34. Intersect(edgeEF, h_1) → J_1
35. OrthogonalLine(J_1, edgeEH, space) → k_1
36. Intersect(k_1, edgeEH) → K_1
37. Point(edgeEH) → L_1
38. Angle(J_1, K_1, L_1) → α
39. Segment(J_1, K_1) → l_1