A hexagonal pyramid is a three-dimensional polytope created by taking the pyramid of a hexagon, which means that it also the segmentope between a hexagon and a point. Its Bowers' acronym is hippy. The regular form of a hexagonal pyramid, where all edges are the same length and all faces are regular, is flat. This is because the height of a regular n-gonal pyramid is given by the formula , which is equal to zero when n=6.