document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=877005>Question 877005</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Regular pentagon PQRST is inscribed in circle U. PU= 10 cm. find the length of arc PS to the nearest tenth of a centimeter <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 #529106 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=529106\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The center and the five points on the circle form five isosceles triangles.  The one tip angle of each triangles is 360/5=72 degrees, and the two equal sides of each triangle are PU=10 cm. each.\r<BR>\n" );
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document.write( "What this question really seems to need is that from P to S is 3/5 the way around the circle, and that you already have the radius, PU=10, and can take 3/5 of the circumference.  That seems to be all that you need.\r<BR>\n" );
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document.write( "With that, Arc PS is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283%2F5%29%2A%282pi%2A10%29=highlight%2812pi%29 ALIGN=MIDDLE  ALT=\"%283%2F5%29%2A%282pi%2A10%29=highlight%2812pi%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > centimeters. </SPAN>\n" );
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