A polyhedron is a 2 dimensional object. To have fasce it would have to be at least 3 dimensional.
If you want to know what is a polyhedron with 4 sides, it's a quadrilateral
THAT'S NOT QUITE RIGHT - actually it's completely false.
Sorry, Ratty, a polyhedron is a 3 dimensional figure. Polygon refers to 2 dimensional figures. A pyramid with a triangular base is a polyhedron with 4 faces.
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A polyhedron can have any number of faces 4 or higher.
4
Tetrahedron
A polyhedron must have at least 4 faces, at least 4 vertices and at least 6 edges.
A polyhedron that has 2 congruent faces is a PRISM. To be a prism, all the other sides (not including the 2 that are congruent) have to be 4-sided.