document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=578125>Question 578125</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given: Quadrilateral ABCD is a parallelogram.<BR>\n" );
document.write( "       Angle C is a right angle.\r<BR>\n" );
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document.write( "Conclusion: Quadrilateral ABCD is a rectangle.\r<BR>\n" );
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document.write( "How will i prove this? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #370550 by </B><A HREF=/tutors/aboutme.mpl?userid=ad_alta><B>ad_alta(240)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ad_alta><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=ad_alta><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=370550\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If C is right, the angle opposite C is also right. Since the adjacent angles must sum to 180, the other angles are right as well. Thus, the parallelogram is a rectangle. </SPAN>\n" );
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