document.write( "Question 980247: If (-10,-2), (-3,4), and (6,4) are coordinates of three vertices (corners) of a parallelogram, determine the coordinates of three different points that could serve as the fourth vertex.\r
\n" ); document.write( "\n" ); document.write( "My answer was (-1,-2), (-20,-2), and (-13,4). The books answer was (-1,-2), (-19,-2), and (13,10). I drew the graph with my three points and it has the shape of the parallelogram. Let me know if I'm right or help me if I'm wrong. \n" ); document.write( "
Algebra.Com's Answer #601447 by AnlytcPhil(1807)\"\" \"About 
You can put this solution on YOUR website!
Get some graph paper. \r\n" );
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document.write( "Notice that to go from (6,4) to (-3,4) you go 9 units left.\r\n" );
document.write( "Therefore you go 9 units left from (-10,-2) and end up at (-19,-2)\r\n" );
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document.write( "From (-10,-2) to (-3,4) you have to go right 7 units and up 6. So you start at\r\n" );
document.write( "(6,4) and do the same -- go right 7 and up 6, and you end up at (13,10)\r\n" );
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document.write( "If you put all those together on one graph, you have a triangle with the midpoints of the sides connected.\r\n" );
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document.write( "Edwin
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