document.write( "Question 290353: you have a parallelogram made up of two triangles (triangle RST and triangle RUT).
\n" ); document.write( "Given: line segment RU is parallel to line segment ST
\n" ); document.write( " angle S is congruent to angle U
\n" ); document.write( "Prove: line segment RS is congruent to line segment TU\r
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\n" ); document.write( "\n" ); document.write( "how can i do this?
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Algebra.Com's Answer #210149 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
Draw the figure so you can see it.
\n" ); document.write( "Mark the angles U and S as equal
\n" ); document.write( "mark the line segments RU and ST as congruent
\n" ); document.write( "mark the diagonal RT as congruent with RT in the two triangles RUT and RST since they are the same line segment.
\n" ); document.write( "Now you have two sides and and angle that are congruent. Therefore the two triangles are congruent and so the third sides RS and UT are congruent\r
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\n" ); document.write( "\n" ); document.write( "I bet you don't know from the beginning that it is a parallelogram. If you did then the whole proof is unnecessary.since opposite sides in a parallelogram are parallel and congruent.
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