Dice are small, throwable objects with marked sides that can rest in multiple positions. They are used for generating random numbers, commonly as part of tabletop games, including dice games, board games, roleplaying games, and games of chance.
Various shapes like twosided or foursided dice are documented in archaeological findings; for example, from Ancient Egypt and the Middle East. While the cubical sixsided die became the most common type in many parts of the world, other shapes were always known, like 20sided dice in Ptolemaic and Roman times.
Dice are often sold in sets, matching in color, of six different shapes. Five of the dice are shaped like the Platonic solids, whose faces are regular polygons. Aside from the cube, the other four Platonic solids have 4, 8, 12, and 20 faces, allowing for those number ranges to be generated. The only other common noncubical die is the 10sided die, a pentagonal trapezohedron die, whose faces are ten kites, each with two different edge lengths, three different angles, and two different kinds of vertices. Such sets frequently include a second 10sided die either of contrasting color or numbered by tens, allowing the pair of 10sided dice to be combined to generate numbers between 1 and 100.
