Topic Pi geometry - π
  There are many calculation possibilitiues for the circle number π . Within this basic introduction you will find the geometrical basics and some results thereof. An extremely helpful book was written by Jörg Arndt/ Christoph Haenel, Springer Verlag, Kreiszahl Pi - Algorithmen, Computer, Arithmetik.

Even if this calculation seems to be simple (and two thousand years of calculation is a solid proof), you have to do it by yourself. It is just creating fun.
Presentation The report contains 13 pages at 1 MB file size - sorry, only in German
Data The Excel calculation file consist of 10 sheets with 1.3 MB file size
Notes nothing special - you will find much more details about this number in the literature
Aug 2017