The area of a regular hexagon is 55 in^2. find the length of a side. round your answer to the nearest tenth. i know the answer is 4.6 in., but i have no idea how to solve it.

Polygon area = n*side length^2 / [4*tan(180/n)]
side length^2 = polygon area * [4*tan(180/n)] / n
where n is the number of sides
side length^2 = 55 sq inches * (4*tan(180/6)) / 6
side length^2 = 55 sq inches * 4 * tan (30) / 6
side length^2 = (55 sq inches * 4 * 0.57735) / 6
side length^2 = 127.017 / 6
side length^2 = 21.1695
side length = square root ( 21.1695 )
side length = 4.6010324928