If the sum of the interior angles of a polygon is 3780°,Find the
number of sides.
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Answer: Sum of interior angles = (2n-4)*90
= 3780 = (2n-4)*90
2n-4 = 3780/90
= 2n-4 = 42
= 2n = 42+4
= 2n = 46
= n = 46/2
= n = 23 sides
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