In this image we see the classic hexagonal honeycomb structure of the enlightened honeybee. The hexagonal structure is common to the nesting architecture many related insects, including wasps, et cetera. Note that the strength of the comb is improved not only by the superior hexagonal geometry, but also by the skillful employment of rhombic facets at the closed end of the cells.
"In 1965, László Fejes Tóth discovered that the trihedral pyramidal shape (which is composed of three rhombi) used by the honeybee is not the theoretically optimal three-dimensional geometry. A cell end composed of two hexagons and two smaller rhombuses would actually be .035% (or approximately 1 part per 2850) more efficient."