false
Not true. They have only one base and several (3 or more) lateral triangular faces. A pyramid has a single vertex over a base - there are no parallel faces in any pyramid.
any face that is not a base is?
If by "vertex," you mean "apex," than any pyramid would fit the description.
A pyramid has a polygonal base with all other sides being triangles. As the Egyptians famously demonstrated, a common pyramid has a square base with four triangles meeting at a vertex, but any polygon - regular or irregular - can be used as the base of such a polyhedron.
A polyhedron of which one face is a polygon of any number of sides, and the other faces are triangles with a common vertex.
A pyramid is an object with one face as a polygon with any number of sides and the other faces as triangles with a common vertex.
V = 1/3 Bh
The vertex that does not have any weighting assigned to it in the graph is called an unweighted vertex.
There are an infinite number of such polyhedra. Starting with a tetrahedron (triangular base), the next up is the quadrilateral pyramid (quadrilateral base), then the pentagonal pyramid, the hexagonal pyramid and so on.
In any of the corners
A vertex on a cube, for example, is where any three edges meet. On a pyramid (square type) it could be at the point on the top or the 4 bottom edges. :)
Vertex of a triangle is any of its 3 corners and the plural of vertex is vertices