∵平行四ABCD中,AE垂直BC于E,AF垂直CD于F,∴ ∠AEB=∠EAD=90,∠AFD=∠FAB=90,又∵角EAF等于60度∴ ∠BAE=30,∠FAD=30,∴ Rt△ADF中,AD=2*DF=2*3=6,AF=DF*√3=3√3Rt△AEB中,AB=2*BE=2*2=4∴ S=AB*AF=4*3√3=12√3平...