Given a icosahedron with side edge length of $a$, and its $12$ vertices coordinates in 3D, how can I calculate the new length $\hat a$ so that the icosahedron will fit into a unit sphere with its vertices touching the surface of the sphere?
2026-04-21 16:49:45.1776790185
What is the ratio/formula to use to circumbscribe a icosahedron it in a unit sphere?
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