立方体在球内的构造

GeoGebra 命令及参数

1. Intersect(yAxis, xAxis) → A
2. Point(xAxis) → B
3. Point(Circle[B, Distance[A, B], Segment[A, B]]) → C
4. Cube(A, B, C) → a, D, faceCDHG, faceEFGH, edgeAD, edgeAB, edgeBC, edgeCD, edgeAE, edgeDH, edgeEH, edgeEF, E, edgeBF, edgeFG, edgeCG, edgeGH, F, G, H, faceABCD, faceADHE, faceABFE, faceBCGF
5. Segment(E, C) → f
6. Segment(H, B) → g
7. Intersect(f, g) → I
8. Sphere(I, H) → b
9. Segment(I, E) → h
10. Segment(I, F) → i
11. Midpoint(edgeEF) → J
12. Intersect(edgeEF, h) → K
13. Segment(E, B) → j
14. Segment(F, A) → k
15. Intersect(k, j) → L
16. Polygon(E, C, A) → DiameterTriangle, a_1, e, c
17. Polygon(J, I, L) → MidTriangle, l_1, j_1, i_1
18. Segment(I, J) → l
19. Polygon(I, E, F) → RadiTriangle, f_1, i_2, e_1