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en.wikipedia.org/wiki/Pi

The number π is a mathematical constant. Originally defined as the ratio of a circle's circumference to its diameter, it now has ...

www.geom.uiuc.edu/~huberty/math5337/groupe/digits.html

100,000 Digits of Pi Pi Logo. 3.141592653589793238462643383279502884197169399375105820974944592307816406286  ...

www.piday.org/million

One Million Digits of Pi. 3.... More Pi Stuff. Pi Sightings: Things to do for Pi Day · Digits: New Pi Calculation Record Set · Pi Sightings: A Couple Weird Things ...

theconversation.com/the-search-for-the-value-of-pi-55744

Mar 11, 2016 ... On the occasion of Pi Day, a look at the history of calculating the actual, and increasingly exact, value of pi (π).

wiki.c2.com/?ValueOfPi

Seriously, it does make sense to define "pi" as a defined constant - not .... That's why we say that the value of Pi doesn't change in gravitational fields, or in other ...

www.scientificamerican.com/article/the-long-search-for-the-value-of-pi

Mar 14, 2016 ... The mathematical odyssey, plus a guide to calculating pi for yourself.

www.scientificamerican.com/article/what-is-pi-and-how-did-it

Regardless of the circle's size, this ratio will always equal pi. In decimal form, the value of pi is approximately 3.14. But pi is an irrational number, meaning that its ...

www.wired.com/2016/03/six-things-probably-didnt-know-pi

Mar 14, 2016 ... No matter how big your circle, the ratio of circumference to diameter is the value of Pi. Pi is an irrational number—you can't write it down as a ...

mathforum.org/isaac/problems/pi1.html

Historians estimate that by 2000 B.C. humans had noticed that the ratio of circumference to diameter was the same for all circles. This discovery hinged on the ...