Dual polyhedron facts for kids
In geometry, every polyhedron is related to a dual polyhedron, where the vertices (points) of one polyhedron match with the faces (flat surfaces) of the other, and the edges connecting vertices in one polyhedron match with the edges connecting faces of the other. Starting with any given polyhedron, the dual of its dual is the original polyhedron.
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Dual polyhedron Facts for Kids. Kiddle Encyclopedia.