Any polygon can be the base of a pyramid and so any polygon can form a polyhedron.
They are the faces of the polyhedron.
They are its faces.
that's a statement, but if you ment to say are the... then yes
No, they are the faces of the polyhedron.
True.
true
False
False
False
The polyhedron is composed of several polygons.
no
Polyhedra (singular: polyhedron)