Before getting to the main formula of calculating the volume of a square pyramid, let’s discuss what the pyramid is. Pyramid is a polyhedron, one of the faces of which (called the base) is an arbitrary polygon, and the other faces (called lateral faces) are triangles with a common vertex. By the number of angles of the base the pyramids can be triangle (tetrahedron), quadrangular, and so on. Pyramid is a particular case of the cone. History of the Pyramid in Geometry The start of pyramid geometry began in ancient Egypt and Babylon, however, its active development happened in ancient Greece. The volume of the pyramid (including a square pyramid) was known to the ancient Egyptians. The first Greek mathematician who established what the volume of the pyramid equals to was Democritus, and Eudoxus of Cnidus proved that.