以△ABC面积为单位1,S△AEF/S△ABC=(1/3)^2=1/9,S△AEF=1/9,
S△ANM/S△ABC=(2/3)^2=4/9,S四边形EMNF=4/9-1/9=1/3,S四边形MBCN=1-4/9=5/9,S△AEF:S四边形EMNF:S四边形MBCN=1:3:5
以△ABC面积为单位1,S△AEF/S△ABC=(1/3)^2=1/9,S△AEF=1/9,
S△ANM/S△ABC=(2/3)^2=4/9,S四边形EMNF=4/9-1/9=1/3,S四边形MBCN=1-4/9=5/9,S△AEF:S四边形EMNF:S四边形MBCN=1:3:5