等截面的两个三棱锥

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. Vector(A, A') → u
3. Translate(poly1, u) → poly1'
4. Translate(C, u) → C'
5. Translate(B, u) → B'
6. OrthogonalPlane(D, zAxis) → d
7. PointIn(d) → E
8. Pyramid(poly1, D) → e, faceABD, faceBCD, faceACD, edgeAD, edgeBD, edgeCD
9. Pyramid(poly1', E) → f, face1, face3, face2, edge1, edge2, edge3
10. OrthogonalLine(F, xOyPlane) → g
11. Point(g) → G
12. Vector(F, G) → w
13. OrthogonalPlane(G, g) → h
14. IntersectPath(h, e) → poly2, H, I, J, i, j, k
15. IntersectPath(h, f) → poly3, K, L, M, l, m, n