If the sum of the measures of the interior angles of a regular polygon is 1980. Find the number of sides in the polygon?

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Answer 1 · 2018-06-21T07:13:38

#13#

for a regular polygon, with #n# number of sides, the sum of interior angles is given by;

#S=(n-2)xx180#

we have

#1980=(n-2)xx180#

#=>n-2=1980/180#

#:.n-2=11#

#n=13#

no of sides is #13#