Flying saucer. and a cone
a pentagonal pyramid
base
No. Polyhedra are three-dimensional objects, and the base of any prism, strictly speaking, should be two-dimensional. Any convex polygon (which is two-dimensional) can form the base of a pyramid. A circle, which is technically not a polygon, is the only convex two-dimensional figure that cannot form the base of a pyramid because it forms the base of a cone.
If you mean a pyramid with a four sided base, it is a square pyramid. If you mean one with four faces, it is a tetrahedron.
pyramid
A pyramid with a circle as it's base is also called a cone and it has two faces.
A cone ?
A cone
a pentagonal pyramid
A pyramid with a square base is called a square pyramid. It is a three-dimensional shape that has a square as its base and four triangular faces that meet at a point called the apex.
the base, plane, or bottom
A pyramid has one base. Whichever side is on the bottom is called the base.
its called a base.
base
The ancient Egypt thirty-foot wall surrounding the base of the pyramid is called a Temenos.
A four sided pyramid is called a square based pyramid. It has a square base and four sides,(called edges,) that join at the apex. (the top of the pyramid.)
yes, it's a pyramid with a square base/bottom.