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Oct 30, 2014 at 12:48 comment added John Alexiou I added a sketch in order to make the calculation clearer (I hope).
Oct 30, 2014 at 12:47 history edited John Alexiou CC BY-SA 3.0
added 61 characters in body
Oct 30, 2014 at 12:31 history edited John Alexiou CC BY-SA 3.0
added 89 characters in body
Oct 29, 2014 at 21:31 history edited John Alexiou CC BY-SA 3.0
added 88 characters in body
Oct 29, 2014 at 21:26 history answered John Alexiou CC BY-SA 3.0