∵ABCD是正方形,
∴AB+AD,∠B=∠D=90°,
∵BE=DF,∴ΔABE≌ΔAEF……①
∵ABCD是正方形,∴∠ACB=∠ACD=45°,BC=CD,
∵BE=DF,∴CE=CF,
∵AC=AC,∴ΔACB≌ΔACD……②
∵CN=CN,∴ΔNCE≌ΔNCF……③
∵AC=AC,∴ΔACE≌ΔACF……④,
由④得:∠NAE=∠NAF,AE=AF,又AN=AN,
∴ΔANE≌ΔANF……⑤
∵ABCD是正方形,
∴AB+AD,∠B=∠D=90°,
∵BE=DF,∴ΔABE≌ΔAEF……①
∵ABCD是正方形,∴∠ACB=∠ACD=45°,BC=CD,
∵BE=DF,∴CE=CF,
∵AC=AC,∴ΔACB≌ΔACD……②
∵CN=CN,∴ΔNCE≌ΔNCF……③
∵AC=AC,∴ΔACE≌ΔACF……④,
由④得:∠NAE=∠NAF,AE=AF,又AN=AN,
∴ΔANE≌ΔANF……⑤