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Distorting Jessen's Orthogonal Icosahedron to an Octahedron

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Jessen's icosahedron is constructed by replacing six pairs of adjacent triangles in a regular icosahedron with pairs of isosceles triangles sharing a common base. There are six bases and they form three pairs of parallel edges.

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This Demonstration varies the edges to distort the polyhedron until it closes up into a regular octahedron.

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Contributed by: Izidor Hafner (January 2014)
Open content licensed under CC BY-NC-SA

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Reference

[1] D. Wells, The Penguin Dictionary of Curious and Interesting Geometry, London: Penguin Books, 1991 p. 161.

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