如图,AB=AE,AB⊥AE,AD=AC,AD⊥AC.点M是BC的中点,求证:DE=2AM亲们可以只写明做辅助线的的方法和较具体的思路就行咧的。
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ab⊥ac.ad⊥ae .ab=ac .ad=ae .说明 be⊥cd