14 March 2014


Happy Pi Day, math-lovers!  Pi, symbolically known as π, is the special value 3.14159 yada yada yada, much used in math.  It is defined as the ratio of the circumference to the diameter.  The circumference of a circle is just the perimeter, i.e. that length of the line that goes around the circle.  Diameter is that constant distant between any two opposing points on the circle.  The number is unique and goes on forever without repeating.  Some people memorize it to many decimal places.  I fancy myself an engineer and only care about it for practical purpose, so 3.14 would do, 3.14159 is even better, but that's where I draw the line.

This morning when I went for a run I drew a different kind of line, thanks to my Garmin watch.  I like math and love running, but last year I was totally unaware of the approach of March 14, which in the U.S. and a few other places can be thought of as 314.  Like how we have 911 for September 11.  314, 3.14, Pi Day!  This year I planned for Pi Day and ran 3.14 km with the route showing the π symbol.  I didn't have a lot of time so I just ran within a few blocks, repeating the route a few times before completing the symbol.  I usually measure my runs in km so 3.14 km worked fine.  3.14 miles would take more time, which I don't have in these pre-dawn runs on a school day.

Happy Pi Day!  Maybe next year Rebecca Black will have a song about it...


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