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 and  are two isosceles triangle on the same side of Then,  (or ) produced bisects  at right angle.
If the above statement is true then mention answer as 1, else mention 0 if false

Answer

Join AD.Let it meet BC in O
In  ABO and  ACO,
AB = AC (Given)
(ABD is an isosceles tiangle)
AO = AO (Common side)
  (By SSA congruence rule)
Hence,  (Corresponding angles of congruent triangles)
Now,


Thus, AD bisects BC at right angles.

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