document.write( "Question 260453: Given: A (4,3), B (8,3), C (9,10), and D (5,10) are vertices of a quadrilateral. Is quadrilateral ABCD a parallelogram? Use mathmatics to justify your answer. (graphing is not acceptable) .... I need an example or this answer cause im very confused....Thank you \n" ); document.write( "

Algebra.Com's Answer #191839 by richwmiller(17219) $\"\"$ $\"About$

You can put this solution on YOUR website!
You can graph it to help you picture the figure but you must give a mathematical answer. You can't talk about the graph per se in your answer.
\n" ); document.write( "We can see just by looking at the points that the length of AB is the same as the length of CD ie 4
\n" ); document.write( "Now you need to show that BC and AD are equal.
\n" ); document.write( "You also want to show that the lines (AB and CD) and (BC and AD) are parallel by showing that the slopes are the same.\r
\n" ); document.write( "\n" ); document.write( "If the sides are of equal length and are parallel I believe that is enough to show that it is a parallelogram.\r
\n" ); document.write( "\n" ); document.write( "Do you know how to do any of that? \n" ); document.write( "

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