The great icosahedron is a regular polyhedron formed from twenty intersecting equilateral triangles which combine to produce a figure with twelve points. The surface was first described by the Frenchman Louis Poinsot in 1809 and is now known as a Kepler-Poinsot solid. This is a cut and folded paper version of the surface. A mark on it reads: 367. Another mark reads: Hobron '25.
For an older model of this surface, see MA.304722.28. Compare 1979.0102.092, 1979.0102.259, and 1979.0102.278
H. M. Cundy and A. P. Rollet, Mathematical Models, Oxford: The Clarendon Press, 1961.
Magnus J. Wenninger, Polyhedron Models, Cambridge: Cambridge University Press, 1974, p. 63-64.
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