a cylinder l
6 flat surfaces - known as faces, 12 edges 8 vertices.
a sphere, of course!
No. By definition a polyhedron has to have faces (flat surfaces), edges, and vertices. A sphere, hemisphere, and a cylinder are all solids but are not polyhedra.
a cube has 8 vertices 12 edges and 6 faces to of which are bases
It has 2 flat faces, 1 curved face, 2 parallel edges and no vertices
A quadrilateral based pyramid.
The three parts are faces, vertices and edges. The faces are the flat surfaces, the edges are the lines that joint the corners which are called vertices.