document.write( "Question 267110: find the number of sides of a convex polygon whose sum of the measures of its interior angles is 1260 \r
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Algebra.Com's Answer #196089 by psbhowmick(878)\"\" \"About 
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For a convex regular polygon of n sides the sum of all the internal angles is equal to \"%28n-2%29%2Api\". \r
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\n" ); document.write( "\n" ); document.write( "To find the no. of sides,
\n" ); document.write( "\"%28n-2%29%2A180+=+1260\"
\n" ); document.write( "\"n-2+=+1260%2F180\"
\n" ); document.write( "\"n-2+=+7\"
\n" ); document.write( "\"n+=+7+%2B+2+=+9\"\r
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\n" ); document.write( "\n" ); document.write( "Hence, the polygon has 9 sides.
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