Answer :
Final answer:
A polyhedron is a solid bound by polygonal regions formed by intersecting planes. Examples include the tetrahedron and the Platonic solids.
Explanation:
A polyhedron is a solid bounded by polygonal regions formed by intersecting planes. In geometry, a tetrahedron, for example, is a polyhedron with four triangular faces, six straight edges, and four vertex corners. The Platonic solids, such as the tetrahedron, octahedron, icosahedron, cube, and dodecahedron, are examples of polyhedra with specific characteristics.
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