document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=800995>Question 800995</A>: <I><SPAN STYLE=\"word-break: break-all;\">       a new lookout tower is to be equidistance from three ranger stations. If the stations are at positions A(-90,28) B(0, -35) C(125,20) find the coordinates of the point where the new tower should be built<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 #483407 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=483407\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is similar.<BR>\n" );
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document.write( "A triangle has three vertices: A(3,5), B(7,1), and C(1,-1)<BR>\n" );
document.write( "a)Find the equation of the perpendicular bisectors of: AB, BC, and AC<BR>\n" );
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document.write( "Find the line thru A & B<BR>\n" );
document.write( "Slope = diffy/diffx = -4/4 = -1<BR>\n" );
document.write( "Slope m of lines perpendicular is the neg inverse, m = 1<BR>\n" );
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document.write( "Find the midpoint: get the average of x & y<BR>\n" );
document.write( "x: (3+7)/2 = 5<BR>\n" );
document.write( "y: (5+1)/2 = 3<BR>\n" );
document.write( "Midpoint (5,3)<BR>\n" );
document.write( "Now get the eqn of the line m = 1 thru (5,3)<BR>\n" );
document.write( "Use y = mx + b and the point to find b, the y-intercept<BR>\n" );
document.write( "3 = 1*5 + b<BR>\n" );
document.write( "b = -2<BR>\n" );
document.write( "--> eqn is y = x - 2<BR>\n" );
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document.write( "Do the same for AC and BC<BR>\n" );
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document.write( "b)Find the coordinates of X, the point of intersection of the perpendicular bisector of AB and the perpendicular bisector of BC<BR>\n" );
document.write( "When you have the 2 eqns, solve for the point of intersection.<BR>\n" );
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