Question 290570
<i>In approximate numeric terms, the area of a regular hexagon is 2.598 times the square of its side
length. </i>(http://homepage.mac.com/terhorab/iblog/B1032916816/C181698761/E174145342/Media/hexagonArea.pdf) <br>

{{{ s = sqrt(1200 / 2.598) }}} <br> and bob's your uncle!<br>
If you need a more exacting formula, start with the standard formula for the area of a hexagon:
{{{ ((3*sqrt(3))/2) * s^2 = A  }}} <br>

and convert that to separate the side:
{{{  s = sqrt(a / (((3*sqrt(3))/2))) }}} <br>