document.write( "Question 268944: What is the measure of a vertex angle in a regular polygon with 9 sides? \r
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Algebra.Com's Answer #197040 by Alan3354(69443)\"\" \"About 
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What is the measure of a vertex angle in a regular polygon with 9 sides?
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\n" ); document.write( "The sum of the exterior angles is 360 for all polygons.
\n" ); document.write( "360/9 = 40 degs
\n" ); document.write( "Interior angles = 180-40 = 140 degs each
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