∵AB⊥BC,AD⊥DC∴∠ABC=∠ADC=90°在RT⊿ABC和RT⊿ADC中﹛AB=ADAC=AC∴RT⊿ABC≌RT⊿ADC(HL)∴∠BAC=∠DAC∵AB=AD,AE=AE∴⊿ABE≌⊿ADE﹙SAS﹚∴BE=DE希望对你有所帮助 还望采纳~~~
