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OpenStudy (anonymous):
Fins the sum of the interior angles of the following. 1.heptagon 2.nonagon please explain
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OpenStudy (anonymous):
nonagon is nine-sided, right?
OpenStudy (mathteacher1729):
This page has the best explanation of it. http://www.mathsisfun.com/geometry/interior-angles-polygons.html Lots of awesome pictures. :)
OpenStudy (anonymous):
yes its 9
OpenStudy (anonymous):
Be careful!....it is (number of sides-2) times 180....
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