document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=260453>Question 260453</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 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 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #191835 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=191835\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A parallelogram is a quadrilateral in which has opposite sides that are parallel to one another. Recall that parallel lines have equal slopes. So simply find the slopes of lines AB, BC, CD, and AD. If the slope of lines AB and CD are equal, and the slopes of the lines BC and AD are equal, then ABCD is a parallelogram. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );