document.write( "Question 1056700: Four of the angles of a pentagon are 136 degrees, 81 degrees, 140 degrees and 89 degrees. calculate the fifth angle \n" ); document.write( "
Algebra.Com's Answer #671763 by Alan3354(69443)\"\" \"About 
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The sum of the 5 interior angles is 540 degs.
\n" ); document.write( "sum = 180*(n-2) = 180*3 = 540
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