是45°哦
把△ADF绕A点旋转,让AD和AB重合,此时得到△ABF1,那么△ABF1≌△ADF,
AF=AF1,AE=AE,EF=BE+DF=BE+BF1=EF1,故△AEF1≌△AEF,则∠EAF1=∠EAF,而∠EAF1+∠EAF=90°,故∠EAF=45°