八面体与十二面体

GeoGebra 命令及参数

1. If(n ≟ 3, L / t, If[n ≟ 4, L / c, If[n ≟ 5, L / p]]) → ar
2. If(RA ≟ 0, L, If[RA ≟ 1, ar]) → des
3. Circle(O, des, xOyPlane) → ci
4. Point(ci) → A
5. Rotate(A, (360 * ° / n), O) → A'
6. Rotate(A', (360 * ° / n), O) → A''
7. Distance(A, A') → b
8. Distance(A, A') → arista
9. Distance(O, A'') → radio
10. Dodecahedron(A, A', A'') → a, B, K, M, N, P, Q, R, S, T, caraAA'A''BC, caraACGNH, C, caraAA'DIH, caraA'A''EJD, caraA''BFKE, caraBCGMF, caraGMSTN, caraHIPTN, caraDIPQJ, caraEJQRK, caraFKRSM, caraPQRST, D, aristaAC, aristaAA', aristaA'A'', aristaA''B, aristaBC, aristaAH, aristaCG, aristaGN, aristaHN, aristaHI, E, aristaDI, aristaA'D, aristaDJ, aristaEJ, aristaA''E, aristaEK, aristaFK, aristaBF, aristaFM, aristaGM, F, aristaMS, aristaST, aristaNT, aristaPT, aristaIP, aristaPQ, aristaJQ, aristaQR, aristaKR, aristaRS, G, H, I, J
11. Midpoint(aristaCG) → U
12. Midpoint(aristaA'A'') → V
13. Midpoint(aristaFK) → W
14. Polygon(U, V, W) → polígono1, w, u, v_1
15. Octahedron(V, W, U) → d, Z, cara3, cara6, aristaUV, aristaVW, aristaUW, arista3, arista2, aristaVZ, arista6, aristaWZ, A_1, arista4, arista5, arista1, arista7, B_1, caraUVW, cara1, cara4, caraVWZ, cara5, cara2
16. Rotate(d, 72°, zAxis) → d1
17. Rotate(d1, 72°, zAxis) → d2
18. Rotate(d2, 72°, zAxis) → d3
19. Rotate(d3, 72°, zAxis) → d4