H = 9.75
OS / OC = AB / BC H / OC = 1.5 / 1的交叉相乘得到H = 1.5OC
OS / OC'= A'B'/ B'C'H / OC = 1.5/1.8交叉相乘1.8H = 1.5OC
OC'= OC +(BB'-1)+ B'C'= OC +3 +1.8 = OC +4.8
1.8H 1.5OC +7.8
两个方程.H = 1.5OC
1.8H = 1.5OC +7.8要0.8H = -7.= -7.8/-0.8 = 9.75?= 9.75
所以,请点通过.