A square pyramid has a square base from which 4 triangles come up to meet at a common vertex.

A pyramid has a polygonal base and flat triangular faces, which join at a common point called the apex. A pyramid is formed by connecting the bases to an apex. Each edge of the base is connected to the apex, and forms the triangular face, called the lateral face.

A square pyramid is shown below:

A square pyramid has a square base from which 4 triangles come up to meet at a common vertex.