document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1070930>Question 1070930</A>: <I><SPAN STYLE=\"word-break: break-all;\"> IF A(2,0),B(p,-2),C(-1,1) and D(3,r) are the vertices of a parallelogram ABCD,calculate the value of p and r.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #685960 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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/cgi-bin/show-face.mpl?user=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=685960\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The diagonals of a parallelogram bisect each other.<BR>\n" );
document.write( "that means that the midpoint of AC is also the midpoint of BD.<BR>\n" );
document.write( "Thee coordinates of the midpoint of a segment<BR>\n" );
document.write( "are the averages of the corresponding coordinates<BR>\n" );
document.write( "of the endpoints of the segment.<BR>\n" );
document.write( "The midpoint of AC is ((2+(-1))/2,(0+1)/2) = (1/2,1/2) .<BR>\n" );
document.write( "The midpoint of BD is ((p+3)/2,(-2+r)/2) .<BR>\n" );
document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28p%2B3%29%2F2=1%2F2 ALIGN=MIDDLE  ALT=\"%28p%2B3%29%2F2=1%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > <--> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p%2B3=1 ALIGN=MIDDLE  ALT=\"p%2B3=1\"   DISABLED_style= \"max-width:90%; height:auto;\" > <--> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p=1-3 ALIGN=MIDDLE  ALT=\"p=1-3\"   DISABLED_style= \"max-width:90%; height:auto;\" > <--> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28p=-2%29 ALIGN=MIDDLE  ALT=\"highlight%28p=-2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  ,<BR>\n" );
document.write( "and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-2%2Br%29%2F2=1%2F2 ALIGN=MIDDLE  ALT=\"%28-2%2Br%29%2F2=1%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > <--> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2%2Br=1 ALIGN=MIDDLE  ALT=\"-2%2Br=1\"   DISABLED_style= \"max-width:90%; height:auto;\" > <--> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=1%2B2 ALIGN=MIDDLE  ALT=\"r=1%2B2\"   DISABLED_style= \"max-width:90%; height:auto;\" > <--> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28r=3%29 ALIGN=MIDDLE  ALT=\"highlight%28r=3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  .<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28300%2C300%2C-4%2C4%2C-4%2C4%2C%0D%0Agrid%281%29%2Cred%28line%282%2C0%2C-1%2C1%29%29%2C%0D%0Ared%28line%28-2%2C-2%2C3%2C3%29%29%2C%0D%0Aline%282%2C0%2C-2%2C-2%29%2Cline%28-1%2C1%2C-2%2C-2%29%2C%0D%0Aline%28-1%2C1%2C3%2C3%29%2Cline%282%2C0%2C3%2C3%29%0D%0A%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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