document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=526246>Question 526246</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone help me with this I don't understand proofs at all. Here is the link to what I do not understand. Can you explain how to do this right! <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 #348501 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=348501\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since angle 1 and angle 2 are equal, name each angle \"x.\" The sum of angle 1 and angle 2 is 2x, which is equal to 180 degrees (since BD is a straight line). Hence 2x = 180, x = 90, so the angles are right angles. This implies that AC and BD are perpendicular.\r<BR>\n" );
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document.write( "Use this to write out your proof. </SPAN>\n" );
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