What is Pentachoron?
[[File:5-cell.gif|thumb|A pentachoron, rotating in just one plane]] [[File:Stereographic polytope 5cell.png|thumb|A ''tube diagram'']] In [[geometry]] a '''Pentachoron''' is an object in four-dimensional ([[4D]]) space. It is a [[regular polytope]] and a 4-[[simplex]]. It is also called '''hyperpyramid''', '''5-cell''' or '''pentatope'''. It has 5 cells (''faces''). Each cell is a [[tetrahedron]]. {{math-stub}} [[Category:Shapes]]