正方锥体的底层结构

GeoGebra 命令及参数

1. Intersect(yAxis, xAxis) → D
2. Point(zAxis) → E
3. PointIn(c) → F
4. Pyramid(D, A, C, B, F) → b, faceACBD_1, edgeDF, edgeAF, edgeCF, edgeBF, faceADF, faceACF, faceBCF, faceBDF, edgeAD_1, edgeAC_1, edgeBC_1, edgeBD_1
5. Ray(G, H) → f
6. Point(f) → I
7. Point(edgeCF) → J
8. Intersect(c, f) → K
9. Pyramid(A, C, B, D, K) → d, faceACBD, edgeAK, edgeCK, edgeBK, edgeDK, faceACK, faceBCK, faceBDK, faceADK, edgeAC, edgeBC, edgeBD, edgeAD
10. Segment(G, K) → h
11. Midpoint(edgeBC) → M
12. Segment(G, M) → j
13. Segment(M, K) → k
14. Polygon(G, M, K) → poly1, k_1, g, m
15. Angle(M, G, K) → α
16. OrthogonalLine(F, e) → i
17. Intersect(i, e) → L
18. Segment(F, L) → l
19. Angle(F, L, A) → β
20. Polygon(K, G, M) → poly2, m_1, k_2, g_1