how to solve regular hexagon

Question

if the sum of the length of the side is 390cm

Answer 1

regular hexagon...polygon with 6 sides

rim-leng=390, so 1 side=390/6=65

polygon area=10,976.871993

put ko-ordinut at (0,0) at senter av polygon & get bottom at y=-56.2916512

hite=+112.583302

alfa=60deg, beta=60 deg, tan(beta)=1.7320508076

inside angel=120 deg, outside angel=60 deg

inside serkel: rad=56.2916512 & area=9954.921705 (senter=(0,0))

outside serkel: rad=65, area=13273.228961

note: for all regular polygons, area=(1/2)*rim-leng*inside radius

=(n/4)*side*side*tan(beta)