document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1016145>Question 1016145</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A right triangle whose vertices are A(2,0) , B(-1,4) , and C(-2,-3) . Find the vertex angle whose measure is equal to 90 degree . </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #632552 by </B><A HREF=/tutors/aboutme.mpl?userid=macston><B>macston(5194)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=macston><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=macston><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=632552\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Slope AB=(4-0)/(-1-2)=-4/3<BR>\n" );
document.write( "Slope BC=(-3-4)/(-2-(-1))=(-7)/(-1)=7<BR>\n" );
document.write( "Slope AC=(-3-0)/(-2-2)=(-3)/(-4)=3/4<BR>\n" );
document.write( ". <BR>\n" );
document.write( "The slope of AC is the negative reciprocal of the slope of AB, <BR>\n" );
document.write( "therefore AC and AB are perpendicular. <BR>\n" );
document.write( ".<BR>\n" );
document.write( "ANSWER: Angle BAC is the right angle </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );