Given that the central angle of a polygon is 18, then the number of sides of the polygon will be: 360/18 =20 sides thus the side length will be: 144/20 =7.2 ft hence the area will b given by: p=s×n a=s/[2tan(180)/n] where: Area=(a×p)/2 p=perimeter, s=side length, n=number of sides p=7.2×20=144 a=7.2/[2tan (180/20)]=22.73 thus A=(144×22.73)/2 A=1632.524 ft²
