document.write( "Question 767097: An angle measures 129 degrees . What is the measure of its supplement? \n" ); document.write( "
Algebra.Com's Answer #467405 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "by definition, supplementary angles add up to \"180\" degrees\r
\n" ); document.write( "\n" ); document.write( "so, if an angle measures \"129\" degrees, its supplement is \"180-129=51\" degrees
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