拱形棚弧长计算方法已知弦L=915MM,拱高H=160MM ,求弧长C和圆的半径R?弧所对的圆心角为A.R^2=(R-H)^2+(L/2)^2R^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)=160/2+915^2/(8*160)=734.082MMA=2*ARC SIN((L...