圆弧弦长为L=W,深为H=h,以弦的中心点为原点为,求圆弧的方程?
圆弧半径为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)
X0=0
Y0=H-R=H-H/2-L^2/(8*H)=H/2-L^2/(8*H)
圆弧的方程为:
(X-X0)^2+(Y-Y0)^2=R^2
X^2+(Y-(H/2-L^2/(8*H)))^2=(H/2+L^2/(8*H))^2
X^2+(Y-H/2+L^2/(8*H))^2=(H/2+L^2/(8*H))^2