The sum of all the angles of the polygon is 1620 degrees. Find the number of sides.

To determine the number of sides of a polygon, use the formula the sum of the angles of a polygon:

180 * (n – 2) = sum of angles.

n is the number of sides of the polygon.

The sum of the angles is 1620.

1620 = 180 * (n – 2);

9 = n – 2;

n = 11.

Answer: The number of sides in a polygon is 11.

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