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Hoberman Sphere (Octahedron)


	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

Octahedron (Wolfram MathWorld)

"Hoberman Sphere (Octahedron)" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/HobermanSphereOctahedron/

Contributed by: Sándor Kabai

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