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 ...