The formula for sum of interior angles of a n sided polygon is Sum of interior angles = (n-2)×180°It is given that sum of interior angles of a polygon = 1980°Let the number of sides = nThus (n-2)×180 = 1980Or n-2 = 1980/180Or n-2 = 11Or n = 11+2 = 13He.ce, the polygon has 13 sides.
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The formula for sum of interior angles of a n sided polygon is
Sum of interior angles = (n-2)×180°
It is given that sum of interior angles of a polygon = 1980°
Let the number of sides = n
Thus (n-2)×180 = 1980
Or n-2 = 1980/180
Or n-2 = 11
Or n = 11+2 = 13
He.ce, the polygon has 13 sides.