Penteract

A penterect is a 5-dimensional object, specifically a 5d version of a cube, with 10 facets (basically faces). Each cell is a tesseract. Together, each cell makes the surface of the penteract. A penteract also has 40 cube cells, 80 square faces, and 32 vertices. Its dual is the 5-orthoplex (the 5d version of an octahedron).