¶ Icosahedron
Index Entry
Icosahedron:
"When the central sphere is removed from the vector equilibrium it contracts symmetrically to a more compact arrangement which is the icosahedron.
“The vector equilibrium has eight triangular faces and six square faces. The six square faces shift to become twelve triangular faces: 12 + 8 = 20 triangular faces for the icosahedron.”
