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

来源: 于 2010-03-28 17:26:56 [旧帖] [给我悄悄话] 本文已被阅读：次

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