document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1210153>Question 1210153</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A and B are two points on a sphere of radius 2. We know the space distance between A and B is 2, What is distance from A to B along the (minor) arc of a great circle?<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 #851404 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=851404\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "If O is the center of the sphere, then OA, OB and AB all have length 2, so triangle AOB is equilateral; its angles are each 60 degrees.<br><BR>\n" );
document.write( "The angle subtended by minor arc AB is then 60 degrees, which is 1/6 of a circle.  The length of minor arc AB is then 1/6 of the circumference of a circle with radius 2.<br><BR>\n" );
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document.write( "ANSWER: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282%2F3%29pi ALIGN=MIDDLE  ALT=\"%282%2F3%29pi\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
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