The hexagonal bifrustum or truncated hexagonal bipyramid is the fourth in an infinite series of
bifrustum polyhedra. It has 12
trapezoid and 2
hexagon
In geometry, a hexagon (from Greek , , meaning "six", and , , meaning "corner, angle") is a six-sided polygon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°.
Regular hexagon
A ''regular hexagon'' h ...
al faces.
This polyhedron can be constructed by taking a
hexagonal dipyramid and truncating the polar axis vertices, making it into two end-to-end
frustums.
Several types of
crystal
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macr ...
take this shape.
It has also been used in the design of 14-sided
dice
Dice (singular die or dice) are small, throwable objects with marked sides that can rest in multiple positions. They are used for generating random values, commonly as part of tabletop games, including dice games, board games, role-playing ...
, which may be used to generate randomly chosen
playing card
A playing card is a piece of specially prepared card stock, heavy paper, thin cardboard, plastic-coated paper, cotton-paper blend, or thin plastic that is marked with distinguishing motifs. Often the front (face) and back of each card has a ...
s.
Set of five, fourteen sided poker dice
Patent US 8074986 B1, Douglas A. Gebhart, filed September 30, 2008. It also has application in novelty promotional calendars: one month can appear on each of the trapezoids, and an advertising or other message on each of the hexagons.
References
External links
Try: t6dP6
Polyhedra
{{Polyhedron-stub