 A point called apex is located outside the hyperplane and gets connected to all the vertices of the polytope and the distance of the apex from the hyperplane is called height.This construct is called a "n"-dimensional hyperpyramid.A normal triangle is a 2-dimensional hyperpyramid, the normal pyramid is a 3-dimensional hyperpyramid and the pentachoron or tetrahedral pyramid is a 4-dimensional hyperpyramid with a tetrahedron as base.