No, the base of a pyramid must be a 2-dimensional shape so no polyhedron can be its base.
It can be any type of pyramid.
A pyramid, as well as any other solid figure bounded by plane polygons or faces, is a polyhedron.
Yes. A polyhedron is a geometric shape with flat surfaces and straight edges, so a a pyramid with a rectangular base qualifies as a polyhedron. It is however not a regular polyhedron, which would require all the faces to be the same shape and size. To change your pyramid to a regular polyhedron you'd have to turn it into a tetrahedron.
A square based pyramid.
Any polygon can be the base of a pyramid and so any polygon can form a polyhedron.
No, the base of a pyramid must be a 2-dimensional shape so no polyhedron can be its base.
It can be any type of pyramid.
No, it cannot.
pyramid .
A Triangular Pyramid
pyramid
A Pyramid; Four sides and the base.
A polyhedron with a polygonal base and triangles for sides.
A pyramid, as well as any other solid figure bounded by plane polygons or faces, is a polyhedron.
Yes. A polyhedron is a geometric shape with flat surfaces and straight edges, so a a pyramid with a rectangular base qualifies as a polyhedron. It is however not a regular polyhedron, which would require all the faces to be the same shape and size. To change your pyramid to a regular polyhedron you'd have to turn it into a tetrahedron.
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.