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The sum of the interior angles of a polygon is 1620. The number of sides of the polygon must be
Let the number of sides of the polygon be $$n$$
Sum of interior angles of any polygon = $$(n-2)\times180=1620$$
=> $$n-2=\frac{1620}{180}=9$$
=> $$n=9+2=11$$
=> Ans - (B)
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