已知弓形弦长为L=2*(3^0.5),弓形高为H=1,则弓形所在圆的半径R?
R^2=(R-H)^2+(L/2)^2
R^2=R^2-2*R*H+H^2+L^2/4
2*R*H=H^2+L^2/4
R=H/2+L^2/(8*H)
=1/2+(2*(3^0.5)L^2/(8*1)
=2