document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=129831>Question 129831</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how would you prove that triangle bca ia a right angled triangle??  co-ordinates on plane are: a(-4,3)   b(2,-4)   c(0,4) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #94808 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><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=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=94808\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You can find distances\r<BR>\n" );
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document.write( "d(C,A)=sqrt(4^2+1^2)=sqrt(17)<BR>\n" );
document.write( "d(C,B)=sqrt(2^2+8^2)=sqrt(68)<BR>\n" );
document.write( "d(A,B)=sqrt(6^2+7^2)=sqrt(85)\r<BR>\n" );
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document.write( "then d(A,B)^2=d(C,A)^2+d(C,B)^2 ehen using Pythagoras Theorem<BR>\n" );
document.write( "triangle ABC is a right angled triangle in C\r<BR>\n" );
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document.write( "(You can also find lines AC and BC and verify they form a right angle) </SPAN>\n" );
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