document.write( "Question 236198: Four angles of a pentagon have measures 30, 60, 120, and 165. Find the measure of the fifth angle. \n" ); document.write( "
Algebra.Com's Answer #173889 by Alan3354(69443)\"\" \"About 
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Four angles of a pentagon have measures 30, 60, 120, and 165. Find the measure of the fifth angle.
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\n" ); document.write( "The sum of the angles of any polygon with n sides is
\n" ); document.write( "180*(n-2)
\n" ); document.write( "A pentagon has 5 sides. 180*(3) = 540º
\n" ); document.write( "30 + 60 + 120 + 165 = 385º
\n" ); document.write( "The 5th angle is 540 - 385
\n" ); document.write( "= 155º\r
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