Any polygon can be a face of a polyhedron.
It can be any polygon.
Yes. A base on a polyhedron is a face and a base on a polygon is a side.
Any polygon can be the base of a pyramid and so any polygon can form a polyhedron.
its a 3-d trangle and i want to know if its a polygon or a polyhedron
There is no specific name nor a specific shape for such a polygon.
No. A polyhedron is a three dimensional body. The base of a pyramid is a two dimensional figure.But any non self-intersecting polygon can be the base of a pyramid.
Any that you like.Any that you like.Any that you like.Any that you like.
A pyramid seems to fit the description.
An antiprism is a polyhedron consisting of two parallel copies of some polygon, connected by an alternating band of triangles.