从O做OP平行AD交CD于PCD=AB=8OP∥AD∠CAD=∠COP,∠CDA=∠CPO所以,△COP∽△CADOP/AD=OC/AC=CP/CD=1/耐绝2OP=AD/2=3,CP=CD/2=4OP∥BC,∠POE=∠CFE,∠OPE=∠FCE所以,△OPE∽△FCECE/PE=CF/棚贺OP=8/3,CE=8CP/11因链亩派为CE+PE=CP=4。CE=8CP/11=32/11