已知弓形的弦长L=12cm弧长C=26cm求弦高H?弧半径为R,弧所对的圆心角为A.Rn+1=(1+(L-2*Rn*SIN(C/(2*Rn)))/(L-C*COS(C/(2*Rn))))*RnR0=7R1=6.483R2=6.55R3=6.552R4=6.552R=6.552cmA=C/R=26/6.552=3.968254弧度=3.968254...