Pi and the size of the Universe - Numberphile

http://www.youtube.com/watch?v=FpyrF_Ci2TQ

Publisher, Numberphile, Video, YouTube

 Pi is famously calculated to trillions of digits - but Dr James Grime says 39 is probably enough.

21 February 2013 Edit: 26 October 2014

NSW Mathematics K-10 Syllabus:
Measurement and GeometryMA4-12MG Length

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