Hoberman Sphere (Octahedron)

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Expandable flat rings made of scissors are placed on a sphere's great circles that lie along the edges of an invisible octahedron. The number of scissors in a ring must be divisible by four. The geometry of this assembly corresponds to that of a Hoberman sphere.

Contributed by: Sándor Kabai (April 2007)
Open content licensed under CC BY-NC-SA




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