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 Problem 19: Isosceles Right Triangle, Excenter, Perpendicular, Congruence. Level: High School, SAT Prep, College geometry

In isosceles triangle ABC (AB = BC), angle B is a right angle. D is the excenter, BE is drawn perpendicular to AD. Prove that AD = 2BE. Post a comment.
Isosceles Right Triangle, Excenter, Perpendicular, Congruence

 

 

 

 

 
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