Respuesta :

AB=AC
AD=AD –-----> ABD≈CAD
BD=DC

BA=AC
A1=A2 -------->BAE≈CAE
AE=AE

BD=DC
D1=D2 -------->BDE≈CDE
DE=DE

so if BDE≈CDE AE and BC are perpendicular.
hope this helps
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