The regular dodecahedron is the Platonic solid with 12 regular pentagonal faces, 20 vertices, and 30 edges.
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A dodecahedron is a three-dimensional geometric shape that is one of the five Platonic solids. It is characterized by having twelve flat faces, each of which is a regular pentagon. The dodecahedron has 20 vertices and 30 edges. In addition to its mathematical properties, dodecahedra can be found in various contexts, including architecture, art, and games (such as the shape of a 12-sided die often used in tabletop role-playing games).