It is a pyramid
pyramid
Pyramid, base
A pyramid seems to fit the description.
It can, but it doesn't have to. The base can be any polygon, as long as the sides are triangles that come to a point at the top.
A polygon with n sides, and n triangles, where n ≥ 3. Most commonly, the polygon at the base is a triangle or a square. If the base polygon is regular and the pyramid is a right pyramid (ie apex above the centre of the basal polygon), the triangles will be isosceles.
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.
pyramid
A pyramid
pyramid
pyramid An pyramid is a geometric solid of the shape made famous by the royal tombs of ancient Egypt. It is a solid whose base is a polygon and whose lateral faces are triangles with a common vertex
a chicken
Pyramid, base
A pyramid seems to fit the description.
It can, but it doesn't have to. The base can be any polygon, as long as the sides are triangles that come to a point at the top.
A pyramid fits the given description
If by "vertex," you mean "apex," than any pyramid would fit the description.
A regular pyramid has a regular polygon base and a vertex over the center of the base. By:Cherrylvr :)