The sides of a rectangle are not all equal so a rectangle is not a regular polygon. And, as a consequence, any 3-dimensional shape made from rectangles cannot be a regular polyhedron.
A Polyhedron is a closed plane figure whose faces are portions of planes. Prisms and pyramids are examples of Polhedron's. While a Regular Polthedron is a Polyhedron whose facces are all regular...
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.