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ABC is an isosceles triangle with AB = AC. Draw AP ⊥ BC to show that B = C.

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ABC is an isosceles triangle with AB = AC. Draw AP ⊥ BC to show that B = C.

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In the question, it is given that AB = AC

Now, ΔABP and ΔACP are similar by RHS congruency as

APB = APC = 90° (AP is altitude)

AB = AC (Given in the question)

AP = AP (Common side)

ΔABP ΔACP.

∴ B = C (by CPCT)

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