A triangle based prismoid and a quadrilateral based pyramid.
A prismoid is like a prism except that its bases (the triangular faces) need not be congruent nor parallel.
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The five regular polyhedra are Tetrahedron, Hexahedron(cube), octahedron, dodecahedron and Icosahedron.
They are polyhedra, with several rectangular faces, and with two identical and parallel bases.
Polyhedra (singular = polyhedron).
faces i geuss * * * * * A pyramid and a prism are two different kinds of polyhedra. There cannot be a pyramid prism just as there cannot be a square triangle!
There are infinitely many polyhedra with one or more triangular faces.