Hexagon

a six-sided plane figure. A regular hexagon has six equal sides and six equal angles. The length of a side is exactly equal to the distance from the center to an angle. It is one of the three regular geometrical figures that may be placed together to fill an area completely. The other two are the triangle and the square. If circles be brought together by equal pressure from all sides, those in the interior will assume the form of a hexagon. Cylinders piled up like cordwood, whether on the side or on end, and subjected to pressure, become six-sided. This is the shape of the prisms of basalt rock formed by the cooling of lava under pressure. The bee builds six-sided cells. See Geometry