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    Question

    In the given figure 1 II M II n, the value of x is 

    A 80º Correct Answer Incorrect Answer
    B 70º Correct Answer Incorrect Answer
    C 60º Correct Answer Incorrect Answer
    D 50º Correct Answer Incorrect Answer

    Solution

    l ∥ m ∥n Sum of interior angles of triangle=180 ° ∠ ABC=180 ° -120 ° =60 ° ∠ ACB=180 ° -∠ A ° -∠ ABC ° =180 ° -70 ° +60 ° =50 ° ∠ ACB=∠x  (corresponding angles) =50 °

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