document.write( "Question 74673This question is from textbook
\n" ); document.write( ": how would you find the missing point of a parallelogram on the coordinate plane if you are given 3 of the points? just give me directions, and i'll carry out the problem. please and thanks :) \n" ); document.write( "

Algebra.Com's Answer #53643 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1) If the given points are
\n" ); document.write( "( $\"x%5B1%5D\"$ , $\"y%5B1%5D\"$ )
\n" ); document.write( "( $\"x%5B2%5D\"$ , $\"y%5B2%5D\"$ ) (the middle point)
\n" ); document.write( "( $\"x%5B3%5D\"$ , $\"y%5B3%5D\"$ )
\n" ); document.write( "Find the slopes of 2 adjacent sides using
\n" ); document.write( " $\"m%5B1%5D+=+%28y%5B2%5D+-+y%5B1%5D%29+%2F+%28x%5B2%5D+-+x%5B1%5D%29\"$
\n" ); document.write( " $\"m%5B2%5D+=+%28y%5B3%5D+-+y%5B2%5D%29+%2F+%28x%5B3%5D+-+x%5B2%5D%29\"$
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\n" ); document.write( "(2) Find ( $\"x%5B4%5D\"$ , $\"y%5B4%5D\"$ ) using
\n" ); document.write( " $\"m%5B1%5D+=+%28y%5B4%5D+-+y%5B3%5D%29+%2F+%28x%5B4%5D+-+x%5B3%5D%29\"$
\n" ); document.write( " $\"m%5B2%5D+=+%28y%5B4%5D+-+y%5B1%5D%29+%2F+%28x%5B4%5D+-+x%5B1%5D%29\"$
\n" ); document.write( "(These are 2 equations with 2 unknowns)
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\n" ); document.write( "If you draw the parallelogram and label points and
\n" ); document.write( "label the parallel sides m1 and m2, this should make sense. \n" ); document.write( "

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