弧长C=3.2米弦长L=2.97米弦中心到弧顶H是多少?
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))))*Rn
R0=2
R1=2.2716
R2=2.3917
R3=2.4094
R4=2.4097
R5=2.4097
R=2.4097米
A=C/R=3.2/2.4097=1.327966弧度=1.327966*180/PI=76.087度
H=R-R*COS(A/2)=2.4097-2.4097*COS(76.087/2)=0.512米