document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=935890>Question 935890</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A triangle has its vertices at A(7,4), B(1,7) and C(-3,4). What is the interior angle (to the nearest degree) at vertex A? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #569269 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=569269\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A triangle has its vertices at A(7,4), B(1,7) and C(-3,4). What is the interior angle (to the nearest degree) at vertex A?<BR>\n" );
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document.write( "AC is \"horizontal\" - parallel to the x-axis<BR>\n" );
document.write( "--> the altitude from B intersects AC at D(1,4)<BR>\n" );
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document.write( "The length of AD is 6.<BR>\n" );
document.write( "The length of BD is 3.<BR>\n" );
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document.write( "tan(A) = 3/6 </SPAN>\n" );
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