A dodecahedron is a three-dimensional shape that has twelve flat faces, each of which is a regular pentagon. It is one of the five Platonic solids, which are shapes with identical faces and angles. The dodecahedron has twenty vertices and thirty edges, making it a complex yet symmetrical structure. In geometry, the dodecahedron is often studied for its unique properties and relationships with other shapes. It can be found in various fields, including architecture and art, and is sometimes used in games, such as Dungeons & Dragons, where it serves as a twenty-sided die.