document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=550744>Question 550744</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A road runs southeast-northwest. A motor home heading northwest on the road makes a left turn onto a<BR>\n" );
document.write( "side street at an angle of 75.2°. Through what angle would a motor home heading southeast on the same<BR>\n" );
document.write( "road need to turn in order to enter that same side street? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #359243 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=359243\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is how it looks from my helicopter, flying low:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28300%2C300%2C-5%2C5%2C-5%2C5%2C%0D%0Aline%285%2C-4%2C-4%2C5%29%2C+line%28-5%2C-3.887%2C0%2C-1%29%2Cline%280%2C-1%2C4%2C-5%29%2C%0D%0Aline%28-5%2C4%2C-1.268%2C0.268%29%2C+line%28-5%2C-1.887%2C-1.268%2C0.268%29%2C%0D%0Aline%285%2C-5%2C0.634%2C-0.634%29%2C+line%28-5%2C-2.887%2C-0.634%2C-0.366%29%2C%0D%0Ared%28arrow%285%2C-4.7%2C2%2C-1.7%29%29%2Cred%28line%282%2C-1.7%2C0%2C0.3%29%29%2C%0D%0Ared%28arrow%280%2C0.3%2C-2%2C-0.854%29%29%2Cred%28line%28-2%2C-0.854%2C-5%2C-2.585%29%29%2C%0D%0Ablue%28arrow%28-5%2C4.3%2C-3%2C2.3%29%29%2Cblue%28line%28-3%2C2.3%2C-0.888%2C0.188%29%29%2C%0D%0Ablue%28arrow%28-0.888%2C0.188%2C-3%2C-1.031%29%29%2Cblue%28line%28-3%2C-1.031%2C-5%2C-2.185%29%29%2C%0D%0Agreen%28arrow%280%2C0.3%2C-4%2C4.3%29%29%2Cgreen%28arrow%28-0.888%2C0.188%2C4%2C-4.7%29%29%2C%0D%0Alocate%28-4%2C4.8%2CA%29%2C+locate%280%2C0.8%2CB%29%2C+locate%28-4%2C-1.7%2CC%29%2C%0D%0Alocate%284%2C-4.5%2CD%29%2C+locate%28-0.888%2C0.688%2CE%29%2C+locate%28-4.7%2C-1.8%2CF%29%2C%0D%0Aarrow%282%2C1%2C2%2C4%29%2C+locate+%281.9%2C4.5%2CN%29%0D%0A%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > The motor home heading northwest follows the red path; the other one follows the blue path.<BR>\n" );
document.write( "The motor home heading northwest changes its direction by the angle ABC (75.2°). The motor home heading southeast changes its direction by the angle DEF (to be found).<BR>\n" );
document.write( "It looks very complicated looking this close up, but it is simpler than it seems. You would see how simple it is if you looked from a higher altitude. There are 2 groups of parallel lines. Seen from a higher altitude, each set of parallel lines would merge into one line, like this.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28300%2C300%2C-5%2C5%2C-5%2C5%2C%0D%0Aline%285%2C-5%2C-5%2C5%29%2C%0D%0Aline%28-5%2C-2.887%2C0%2C0%29%2C%0D%0Alocate+%280%2C0.7%2CB%29%2C%0D%0Alocate+%280.2%2C0.3%2CE%29%2C%0D%0Aarrow%282%2C1%2C2%2C4%29%2Clocate+%281.9%2C4.5%2CN%29%2C%0D%0Alocate%28-1.6%2C0.3%2C%2275.2%B0%22%29%2Clocate%28-2%2C2.3%2CA%29%2C+locate%28-2%2C-1.1%2CF%29%2C%0D%0Alocate%282%2C-2.2%2CD%29%2C+locate%28-2.7%2C-1%2CC%29%0D%0A%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > Angles ABC and DEF are supplementary. They add up to 180°.<BR>\n" );
document.write( "Angle DEF measures 180° - 75.2° = 104.8°<BR>\n" );
document.write( "Disclaimer:I don't really own a helicopter, but I live close to the helicopter museum, which has fairs in which they offer helicopter rides for a very reasonable price (that I don't think I can afford, either). </SPAN>\n" );
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