回複：unless you need the analytical solution, just use excel with

來源: 於 2010-03-28 17:26:56 [舊帖] [給我悄悄話] 本文已被閱讀：次

Central angle=360dgree*A/(pie*r*r).
r*cos(Central angle/2)=r-H.
H=r(1-Cos(A/Pi*r^2)*180).