Question 1 (i) ΔABC and ΔDBC are two isosceles triangles on the same base BC and vertices A and D are on the same side of BC (see the given figure). If AD is extended to intersect BC at P, show that ΔABD≅ΔACD
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Solution
In ΔABD and ΔACD, AB = AC (given) BD = CD (given) AD = AD (common) ∴ΔABD≅ΔACD (by SSS congruence rule)