A regular hexagon has all sides lengths equal.

It has reflective symmetry about each of its 3 main diagonals, and about lines joining

the midpoints of  opposite sides. It has rotational symmetry about its centre (one sixth

of a turn leaves it unchanged). Each side subtends the same angle to the centre

point.

Dimensions of a regular hexagon:

s: the side length

a: the smallest width

A: the largest width

r: the inradius

R: the circumradius