In the following figure AB = AC and AD is perpendicular to BC . BE bisects angle B and EF is perpendicular to AB Prove that ED = EF
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Solution
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In $$ \Delta EFB$$ and $$\Delta EDB $$ $$ \angle EFB = \angle EDB $$ ( both are $$ 90 ^{o}$$) $$EB = EB$$ [ common ]
$$ \angle FBD = \angle DBE $$ (given )
$$ \Delta EFB \cong \Delta EDB $$ By angle-side-angle congruency
Also $$ED = EF$$ (By C.P.C.T)
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