Polyhedron
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In geometry, a polyhedron (plural polyhedra or polyhedrons) is a solid in three dimensions wi flat faces an straicht edges. The wird polyhedron comes frae the Classical Greek πολύεδρον, as poly- (stem of πολύς, "mony") + -hedron (form of έδρα, "base", "seat", or "face").
A polyhedron is a 3-dimensional example o the mair general polytope in ony nummer o dimensions.