∵AB=AD,BC=DCAC=AC∴△ABC≌△ADC(SSS)∴∠BAC=∠DAC∵AB=AC,AE=AE∴△ABE≌△ACE(SAS)∴BE=DE
AC与BD交于点F,因为三角形边AB=AD,BC=DC,所以三角形ABC=ADC,所以ED=EB