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    Question

    If sum of all interior angles of a polygon is 2520, then

    number of sides of that polygon is
    A 19 Correct Answer Incorrect Answer
    B 14 Correct Answer Incorrect Answer
    C 16 Correct Answer Incorrect Answer
    D 11 Correct Answer Incorrect Answer

    Solution

    Sum of all interior angle of a polygon = 180(N - 2) = 2520 or  N - 2 = 14 or N = 14 + 2 = 16

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