Tuesday, 14 February 2017 | Paul Stephenson
Having built a polyhedron from a net or illustration, students will feel pleased with what they have done. But they can now capitalise on their success by finding the properties of their shape. Most important are the planes of mirror symmetry and axes of rotation symmetry. Then there is the matter of how many faces, edges and vertices they have. It is this second question which concerns us here.
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