Four-sided die

Four-sided dice, abbreviated d4, are often used in tabletop role-playing games to obtain random integers in the range 1–4. Three forms exist of this die: a tetrahedron (pyramid shape) with four equilateral triangle-shaped faces, a rectangular prism with rounded or pointed ends, and an elongated long die with four triangular faces. The latter type does not roll well and is thus usually thrown into the air or shaken in a box.