document.write( "Question 1107197: Four of the interior angle of a pentagon are 80-y°, 80+y°,120-y°,120+y°. The size of the 5th interior angle must be??? \n" ); document.write( "
Algebra.Com's Answer #722236 by TeachMath(96)\"\" \"About 
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\n" ); document.write( "the interior angles of a pentagon (5-sided polygon) add up to 540 degrees, not 720 degrees.
\n" ); document.write( "that person (stanbon) is wrong, and the correct answer is 140 degrees.
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