document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=370389>Question 370389</A>: <I><SPAN STYLE=\"word-break: break-all;\"> let L1 and L2 be the line passing through (1,-2) and(4,1), and L2 is the line containing (2,4) and (6,5). Find it an angle between L1 and L2. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #264020 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=264020\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let L1 and L2 be the line passing through (1,-2) and(4,1), and L2 is the line containing (2,4) and (6,5). Find it an angle between L1 and L2.<BR>\n" );
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document.write( "Slope of L1 = diffy/diffx = 3/3 = 1<BR>\n" );
document.write( "Slope of L2 = 1/4<BR>\n" );
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document.write( "The slope is the tangent of the angle between the line and the x-axis<BR>\n" );
document.write( "L1 is 45º<BR>\n" );
document.write( "L2 =~ 14º<BR>\n" );
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document.write( "Angle between L1 & L2 = 31º (the acute angle)<BR>\n" );
document.write( "It's also the supplement, 149º<BR>\n" );
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