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      Question

      The sum of interior angles of a polygon is 1620 degrees.

      Find the number of sides.
      A 21 Correct Answer Incorrect Answer
      B 18 Correct Answer Incorrect Answer
      C 11 Correct Answer Incorrect Answer
      D 39 Correct Answer Incorrect Answer

      Solution

      (n - 2) x 180 = 1620 n - 2 = 9 n = 11

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