(Formerly due 11 November, 1997)
 14") sheet of paper is folded over so that it just touches the left edge of the sheet,  as in the diagram below.  What is the least possible length of the crease C?  [10]
 14") sheet of paper is folded over so that it just touches the left edge of the sheet,  as in the diagram below.  What is the least possible length of the crease C?  [10]
![[folded sheet]](sheet.gif) 
 Department of Mathematics
Department of Mathematics
 
 Trent University
Trent University