知道弧长C=33 弧所对弦长L=10 求半径R?
Rn+1=(1+(L-2*Rn*SIN(C/(2*Rn)))/(L-C*COS(C/(2*Rn))))*Rn
R0=8
R1=60716
R2=7.000
R3=7.023
R4=7.023
R=7.023