document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=401579>Question 401579</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1) Is it sufficient to know the slope of the sides to determine whether a quadrilateral is parallelogram?<BR>\n" );
document.write( "2) Is it sufficient to know the slope of the sides to determine whether a quadrilateral is a rectangle?<BR>\n" );
document.write( "3) Is it sufficient to know the slope of the sides to determine whether a quadrilateral is a trapezoid?<BR>\n" );
document.write( "4) Is it sufficient to know the slope of the sides to determine whether a quadrilateral is a rhombus? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #284184 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=284184\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For the first three questions, it is sufficient to know the slope, since you can determine that a pair of lines is parallel if the slopes are the same. However, for 4), the slope is insufficient since you need to know that the side lengths are equal. </SPAN>\n" );
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