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Web Results

en.wikipedia.org/wiki/Pi

Some approximations

c2.com/cgi/wiki?ValueOfPi

The

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 ...

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

Mar 14, 2016

www.math.com/tables/constants/pi.htm

Pi is a name given to the ratio of the circumference of a circle to the diameter. ...
the needle lands on a line, it turns out to be directly related to the

www.wired.com/2015/03/area-circle-value-pi/

Mar 14, 2015

nrich.maths.org/2490

Read all about the number

www.livescience.com/29197-what-is-pi.html

Apr 30, 2013

www.joyofpi.com/pi.html

The Joy

www.telegraph.co.uk/news/worldnews/asia/japan/8834265/Japanese-mathematician-breaks-record-for-determining-the-value-of-pi.html

Oct 18, 2011

Answer

The
value of pi
to 5 decimal places is 3.14159. Pi is an irrational number, so it cannot be expressed as an exact fraction and its decimal representation has no end.

The Greek letter pi was first used to represent the ratio of the circumference of a circle to its diameter in 1709 by mathematician William Jones.

More Info

www.geom.uiuc.edu

100,000 Digits

www.piday.org

One Million Digits

www.math.rutgers.edu

They used this method to find that