document.write( "Question 904430: < A is a supplement of < B and is a right angle, then what is m < B in degrees? \n" ); document.write( "
Algebra.Com's Answer #548683 by ewatrrr(24785)\"\" \"About 
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180°-A = B
\n" ); document.write( "180°-90° = B
\n" ); document.write( "90° = B
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