A dodecahedron is a three-dimensional geometric shape that is part of the family of polyhedra. It consists of 12 flat faces, each of which is a regular pentagon, and has 20 vertices and 30 edges. The dodecahedron is one of the five Platonic solids, which are characterized by having faces that are all the same shape and size. It has been studied in mathematics and has applications in various fields, including architecture and art.