Rn+1 =(1-(Rn * COS(C/(2 * Rn))-Rn+H)/((C/2)* SIN(C/(2 * Rn))-H))* Rn
R0=60
R1=61.56412
R2=61.64793
R3=61.64816
R4=61.64816
R=61.64816
L=2*(R^2-(R-H)^2)^0.5
=2*(61.64816^2-(61.64816-5)^2)^0.5
=48.640789
這樣妳就可以畫畫了！