SOLUTION: The sun of the interior angles of a regular polygon is 1980˚. How many sides does the polygon have?

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Question 893585: The sun of the interior angles of a regular polygon is 1980˚. How many sides does the polygon have?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Three sides regular polygon have sum of interior angles 180 degrees. Each additional side put in to make a new regular polygon adds 180 degrees more.

DEGREES%2F180%2B2 gives the number of sides.