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Octahedron- A polyhedron with eight faces. All faces of a regular octahedron are congruent, equilateral triangles.
Cube
No, a sphere is not a polyhedron.A polyhedron is a three-dimensional geometric figure whose sides are polygons.A regular polyhedron is a polyhedron whose faces are all congruent regular polygons.
it is a rectangular prism...
The flat surfaces of all polyhedra are called faces and a rectangular prism is simply one kind of polyhedron.