document.write( "Question 274649: Given: angle A is supplementary to angle C.
\n" ); document.write( " angle B is supplementary to angle C.
\n" ); document.write( "Prove: angle A is congruent to angle B.
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Algebra.Com's Answer #200414 by JBarnum(2146)\"\" \"About 
You can put this solution on YOUR website!
im not to good with the wording for the proof but
\n" ); document.write( "if angle A is supplementary to angle C
\n" ); document.write( "then angle A+ angle C = 180degrees
\n" ); document.write( "if angle B is supplementary to angle C
\n" ); document.write( "then angle B+ angle C= 180degrees
\n" ); document.write( "so then angle A+ angle C = angle B+ angle C
\n" ); document.write( "so angle A = angle B\r
\n" ); document.write( "\n" ); document.write( "this mostlikely isnt the write way to write it but im sure u can find the right properties for my explaination to put in order
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