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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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