en.wikipedia.org/wiki/Pi

History. Chronology · Book. In culture. Legislation · Holiday. Related topics.
Squaring the circle · Basel problem · Six nines in π · Other topics related to π...

www.exploratorium.edu/pi/history_of_pi/

Here's a brief history of finding pi: The ancient Babylonians calculated the area of
a circle by taking 3 times the square of its radius, which gave a value of pi = 3.

www.math.rutgers.edu/~cherlin/History/Papers2000/wilson.html

Throughout the history of mathematics, one of the most enduring challenges has
been the .... He did not even use his own formula in his calculation of pi.

www.piday.org/learn-about-pi/

History of Pi. By measuring circular objects, it has always turned out that a circle
is a little more than 3 times its width around. In the Old Testament of the Bible (1 ...

www.ualr.edu/lasmoller/pi.html?

And he made a molten sea, ten cubits from the one brim to the other: it was round
all about, and his height was five cubits: and a line of thirty cubits did compass ...

www.pcworld.com/article/191389/a-brief-history-of-pi.html

Mar 13, 2013 ... In honor of Pi Day, we bring you a brief history of everyone's favorite irrational ...
Actually, the ratio came from nature—it's the ratio between the ...

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

But pi is an irrational number, meaning that its decimal form neither ends (like ...
According to Petr Beckmann's A History of Pi, the Greek letter was first used for ...

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

The ancient Babylonians knew of the existence of pi ... His conception of the use
of upper and lower bounds reached the threshold of the differential calculus.

www-history.mcs.st-andrews.ac.uk/HistTopics/Pi_through_the_ages.html

And he made a molten sea, ten cubits from the one brim to the other: it was round
all about, and his height was five cubits: and a line of thirty cubits did compass ...

www.todayifoundout.com/index.php/2014/07/history-pi/

Jul 24, 2014 ... That the ratio of the circumference of a circle to its diameter is constant has been
known to humanity since ancient times; yet, even today, ...