Help!初三数学简单问题!如图,AB=AE,BC=ED,BC=ED,∠AED=∠AEB+∠CBD.(1)求证AC=AD(2)若AB⊥AD,AE=3,BD=7,求EC.

问题描述:

Help!初三数学简单问题!
如图,AB=AE,BC=ED,BC=ED,∠AED=∠AEB+∠CBD.(1)求证AC=AD(2)若AB⊥AD,AE=3,BD=7,求EC.

把图给出来吧