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    Question

    In triangle ABC, AB = AC. Point D lies on AB such that

    AD = DC = BC. Find the value of ∠BDC.
    A 20° Correct Answer Incorrect Answer
    B 60° Correct Answer Incorrect Answer
    C 40° Correct Answer Incorrect Answer
    D 30° Correct Answer Incorrect Answer

    Solution

    ATQ, Using isosceles triangle and equal segments → equilateral structure forms ∠BDC = 60°

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