Complex sentence: In five dimensional geometry, a hexateron, or hexa-5-tope, is a 5-simplex, a self-dual regular 5-polytope with 6 vertices, 15 edges, 20 triangle faces, 15 tetrahedral cells, and 6 pentachoron hypercells.
Split into simpler sentences: In five dimensional geometry, a 5-simplex is a self-dual regular 5-polytope. It has 6 vertices, 15 edges, 20 triangle faces, 15 tetrahedral cells, and 6 pentachoron hypercells.