Any polygon could be, as long as it's a regularone.
A pyramid
a prism is constructed from two parallel and congruent regular polygons. with vertices joined by edges of length equal to that of the polygons a pyramid has a square base and has 4 triangle joining at a vertex above the centre of the square base. the triangles are isosceles triangles (and can even be equilateral)
A regular pyramid has an equilateral triangular base
A regular pyramid has a regular polygon base and a vertex over the center of the base. By:Cherrylvr :)
A regular pyramid has an equilateral triangle base, not just a regular polygon. It has an apex above the centre of the base.
A regular pyramid has a base that is a regular polygon, meaning all sides and angles are equal. Common examples include a square pyramid with a square base or a triangular pyramid with an equilateral triangle base. The apex of the pyramid is directly above the centroid of the base, ensuring symmetry.
A regular pyramid is a right pyramid whose base is a regular polygon. There are only three regular pyramids: a regular tetrahedron, a regular square pyramid, and a regular pentagonal pyramid.
regular pyramid
Regular Polygon...
vertex
pyramid
Yes.