泰塔星系五边形

GeoGebra 命令及参数

1. Polygon(A, B, 3) → poly1, f, g, h, C
2. Icosahedron(poly1, true) → a, D, faceACF, faceAFG, faceADG, faceABD, faceBDH, faceBEH, faceBCE, faceCEI, faceCFI, faceEHK, E, faceEIK, faceIKL, faceFIL, faceHJK, faceJKL, faceGJL, faceFGL, faceDHJ, faceDGJ, edgeAF, F, edgeCF, edgeAG, edgeFG, edgeAD, edgeDG, edgeBD, edgeBH, edgeDH, edgeBE, edgeEH, G, edgeCE, edgeCI, edgeEI, edgeFI, edgeEK, edgeHK, edgeIK, edgeIL, edgeKL, edgeFL, H, edgeJK, edgeHJ, edgeJL, edgeGL, edgeGJ, edgeDJ, I, J, K, L
3. Polygon(A, B, C) → t1, c, a_1, b
4. Polygon(G, D, A) → t2, a_2, g_1, d
5. Centroid(t1) → M
6. Centroid(t2) → N
7. Midpoint(A, C) → O
8. Midpoint(A, B) → P
9. Midpoint(C, B) → Q
10. Midpoint(A, D) → R
11. Midpoint(G, D) → S
12. Midpoint(G, A) → T
13. Circle(O, P, Q) → e
14. Circle(T, R, S) → k
15. Point(e) → U
16. Line(U, M) → i
17. Intersect(e, i, 2) → W
18. Segment(W, U) → j
19. Point(k) → Z
20. Line(Z, N) → l
21. Intersect(l, k, 1) → V
22. Segment(Z, V) → m
23. Segment(W, N) → n
24. Segment(W, V) → p
25. Segment(W, Z) → q
26. Segment(U, N) → r
27. Segment(U, V) → s
28. Segment(U, Z) → t