正三棱台构造

GeoGebra 命令及参数

1. Polygon(A, B, 3) → poly1, f, g, h, C
2. Pyramid(poly1, 10.15903525496227) → a, D, faceABD, faceBCD, faceACD, edgeAD, edgeBD, edgeCD
3. Point(edgeBD) → E
4. Point(edgeCD) → F
5. Point(edgeAD) → G
6. Polygon(E, F, G) → t1, g_1, e, f_1
7. Polygon(B, C, A) → t2, a_1, b, c
8. Polygon(A, B, E, G) → q1, a_2, b_1, e_1, g_2
9. Polygon(A, C, F, G) → q2, a_3, c_1, f_2, g_3
10. Polygon(B, C, F, E) → q3, b_2, c_2, f_3, e_2
11. Midpoint(f_3) → H
12. Midpoint(b_2) → I
13. Polygon(A, G, H, I) → q4, a_4, g_4, h_1, i
14. Centroid(t1) → J
15. Centroid(t2) → K
16. Segment(J, K) → j
17. Polygon(L, M, N, O) → q5, l, m, n, o
18. Point(n) → P
19. Point(l) → Q
20. Point(l) → R
21. Point(l) → S
22. Segment(O, R) → k
23. Segment(P, Q) → p
24. Segment(N, S) → q
25. Segment(L, R) → r
26. Segment(S, M) → s
27. Polygon(L, R, O) → t3, o_1, l_1, r_1
28. Polygon(S, M, N) → t4, n_1, s_1, m_1