证明：∵四边形ABCD是菱形,∴∠ADC=∠ABC,AD=CD=BC=AB,∵CG=AE,∴∠GDH=∠EBF,DG=BE,在△GDH和△EBF中,{DG=BE∠GDH=∠EBFDH=BF,∴△GDH≌△EBF,∴GH=EF,同理EH=FG,∴四边形EFGH是平行四边形．所以四边形ehgf为平行四...