document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1200552>Question 1200552</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A triangle with vertices A(1, —5), B(—3, 0), and C(2, 3) is rotated 90° clockwise<BR>\n" );
document.write( "about vertex A. Find the co-ordinates of the image of vertex C. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #834708 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=834708\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The \"path\" from vertex A to vertex C is \"up 8, right 1\".<br><BR>\n" );
document.write( "When the triangle is rotated 90 degrees clockwise about vertex A, \"up 8, right 1\" becomes \"right 8, down 1\".<br><BR>\n" );
document.write( "So the image of vertex C is 8 units right and 1 unit down from vertex A.<br><BR>\n" );
document.write( "ANSWER: (1+8,-5-1) = (9,-6)<br><BR>\n" );
document.write( "Depending on your level of math knowledge, you could of course work this problem formally using vectors....<br><BR>\n" );
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