Question

如图，BA⊥AC，CD∥AB，AB＝CE，∠ABC＝∠DEC，则△CDE≌________，理由是________；且有∠ACB＝________，∠ABC＝________，故BC与DE互相垂直．

Answer 1

答案：△ACB,ASA,∠CDE,∠CED