Bone dice from Skara Brae, Scotland have been dated to 3100–2400 BCE. Perhaps the oldest known dice were excavated as part of a backgammon-like game set at the Burnt City, an archeological site in south-eastern Iran, estimated to be from between 28 BCE. The Egyptian game of senet (played before 3000 BCE and up to the 2nd century CE) was played with flat two-sided throwsticks which indicated the number of squares a player could move, and thus functioned as a form of dice. It is theorized that dice developed from the practice of fortune-telling with the talus of hoofed animals, colloquially known as knucklebones. History Composite image of all sides of a 12 mm ( 1⁄ 2 in) Roman die, found in Leicestershire, Englandĭice have been used since before recorded history, and it is uncertain where they originated. Loaded dice are designed to favor some results over others for cheating or entertainment. Dice may also have polyhedral or irregular shapes, may have faces marked with numerals or symbols instead of pips and may have their numbers carved out from the material of the dice instead of marked on it.

When thrown or rolled, the die comes to rest showing a random integer from one to six on its upper surface, with each value being equally likely. They are used for generating random values, commonly as part of tabletop games, including dice games, board games, role-playing games, and games of chance.Ī traditional die is a cube with each of its six faces marked with a different number of dots ( pips) from one to six. Dice of different sizes being thrown in slow motion.ĭice ( SG: die or dice ) are small, throwable objects with marked sides that can rest in multiple positions. Four traditional dice showing all six different sides. It has 10 faces on the polar axis with 10 faces following the equator.For other uses, see Dice (disambiguation). The rhombic icosahedron is a polyhedron composed of 20 rhombic faces, of which three, four, or five meet at each vertex.The rhombic enneacontahedron is a polyhedron composed of 90 rhombic faces, with three, five, or six rhombi meeting at each vertex.It is nonconvex with 60 golden rhombic faces with icosahedral symmetry.

The rhombic hexecontahedron is a stellation of the rhombic triacontahedron.

The great rhombic triacontahedron is a nonconvex isohedral, isotoxal polyhedron with 30 intersecting rhombic faces.

The rhombic triacontahedron is a convex polyhedron with 30 golden rhombi (rhombi whose diagonals are in the golden ratio) as its faces.

The rhombic dodecahedron is a convex polyhedron with 12 congruent rhombi as its faces.

A rhombohedron (also called a rhombic hexahedron) is a three-dimensional figure like a cuboid (also called a rectangular parallelepiped), except that its 3 pairs of parallel faces are up to 3 types of rhombi instead of rectangles.

Three-dimensional analogues of a rhombus include the bipyramid and the bicone as a surface of revolution.Ĭonvex polyhedra with rhombi include the infinite set of rhombic zonohedrons, which can be seen as projective envelopes of hypercubes.

Identical rhombi can tile the 2D plane in three different ways, including, for the 60° rhombus, the rhombille tiling.

One of the five 2D lattice types is the rhombic lattice, also called centered rectangular lattice.

K = p ⋅ q 2 This is a special case of the superellipse, with exponent 1. Quadrilateral, trapezoid, parallelogram, kite

Kite shape proper name