Area of polygon is given as \[\frac{nR^2}{2}sin(\frac{2\pi }{n})\]
where n is the number of sides of the polygon
and R is the radius of polygon
Example for n=6 and radius R= 2 cm we get area as 10.39 \[cm^2\]
Area of polygon can also be written as \[ nr^2tan(\frac{\pi }{n})\]
where n is the number of sides of polygon
r is the distance from the centre to the line joining the adjacent sides of polygon
