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Old 1st July 2007 | 18:17
  #4 (permalink)  
BlueRobin
 
Joined: Aug 2002
Posts: 932
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From: Deepest Warwickshire
Draw the longitudes out on a circle with the prime meridian at the bottom. You can then work out which is the shortest way. Otherwise if using mental gymnastics and doing it your head, you may find that when stressed the mind will fail.
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