Compute area, perimeter, apothem and interior angle of a regular hexagon.
A regular hexagon has 6 equal sides. Each interior angle is 120°. The area formula is ½ × perimeter × apothem, or equivalently (3√3/2)s².
Area
A = (3√3/2) × s²
Apothem
a = s × √3/2
Hexagons tile a plane with no gaps and minimize perimeter for a given area (honeycombs, basalt columns).
The apothem equals (s√3)/2, and the circumradius equals the side length.