document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=744819>Question 744819</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have an arc of 7500mm and the chord that intersects each end of the chord is 6800mm. How can I calculate the radius? Thanks.<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 #453599 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=453599\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Here is what needs to be done:\r<BR>\n" );
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document.write( "draw a line which is perpendicular to the cord and intersects the arc, by definition this line bisects the cord\r<BR>\n" );
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document.write( "now measure the distance along the perpendicular line between the intersection of the cord and the intersection of the arc, call that distance m ( m must be expressed in mm)\r<BR>\n" );
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document.write( "draw two line segments from the cord arc intersection points. where these line segments intersect is the center of the circle  \r<BR>\n" );
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document.write( "now you can calculate the radius using the right triangle formula  \r<BR>\n" );
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document.write( "(r-m)^2 + (c/2)^2 = r^2 for r (note that c is the length of the cord)\r<BR>\n" );
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