# Constructing Polyhedra Using the Icosahedral Group

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An equilateral triangle can be rotated onto itself. The cyclic group describes such actions. Adding mirror images gives the dihedral group . All are subgroups of the infinite special orthogonal group SO(2), also known as the group of 2×2 rotation matrices.

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Contributed by: Izidor Hafner (September 2011)

Additional code by Ed Pegg Jr

Open content licensed under CC BY-NC-SA

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