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Broad Topics > 3D Geometry, Shape and Space > Octahedra

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Age 16 to 18 Challenge Level:

Join some regular octahedra, face touching face and one vertex of each meeting at a point. How many octahedra can you fit around this point?

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Paper Folding - Models of the Platonic Solids

Age 7 to 16

A description of how to make the five Platonic solids out of paper.

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Icosian Game

Age 11 to 14 Challenge Level:

This problem is about investigating whether it is possible to start at one vertex of a platonic solid and visit every other vertex once only returning to the vertex you started at.