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The mathematical constant π is an irrational number, approximately equal to 3.14159, which is the ratio of a circle's circumference to its diameter in Euclidean geometry, and has many uses in mathematics, physics, and engineering. It is also known as Archimedes' constant (not to be confused with Archimedes number) and as Ludolph's number.
The letter π
The name of the Greek letter π is pi, and this spelling is used in typographical contexts where the Greek letter is not available or where its usage could be problematic. When referring to this constant, the symbol π is always pronounced like "pie" in English, the conventional English pronunciation of the letter.
More on [ Pi ]
iya @ryeopi aku sabar kok TT_TT om mu lahirnya kecepetan wakaka eh pi ko foromu bisa ada tulisan SJnya diedit ya? RT @ryeopi sabar ya...
adibadiba (adiba jeyhan shafira) Sat, 02 Jan 2010 05:42:46 -0000
iya @ryeopi aku sabar kok TT_TT om mu lahirnya kecepetan wakaka eh pi ko foromu bisa ada tulisan SJnya diedit ya? RT @ryeopi sabar ya...
@jolayjali hihihi udah kak,pi ttp gk bsa, alexa kak.. hihihi. kakak apa??
poypoymaruru (Icha Aditya hermawan) Sat, 02 Jan 2010 05:42:42 -0000
@jolayjali hihihi udah kak,pi ttp gk bsa, alexa kak.. hihihi. kakak apa??
Q:Do u like @bieberinmypants @JBieber... A:yeah :Pi adore them.their tweets ar... http://formspring.me/BieberHolics/q/16757614 #formspringme
BieberHolics (bieber fans) Sat, 02 Jan 2010 05:39:16 -0000
Q:Do u like @bieberinmypants @JBieber... A:yeah :Pi adore them.their tweets ar... http://formspring.me/BieberHolics/q/16757614 #formspringme
Woyy jgn gt dong ksian kan dy hahaha RT @christianutama: @stephanieepi hahaha ia sih tp yaudalah sudah kepalang tanggung pi uda jahat sekali
claytonnugroho (Clayton Nugroho) Sat, 02 Jan 2010 05:37:54 -0000
Woyy jgn gt dong ksian kan dy hahaha RT @christianutama: @stephanieepi hahaha ia sih tp yaudalah sudah kepalang tanggung pi uda jahat sekali
Apa pi ? RT @deshafa: @vidypidi hey kamu..
vidypidi (vidyana diahtantri) Sat, 02 Jan 2010 05:37:08 -0000
Apa pi ? RT @deshafa: @vidypidi hey kamu..
T-Shirts & Apparel : pi*z*z*a. Equal to its volume. Loved it! http://tinyurl.com/yfewgcw
Acertijo (Acertijo) Sat, 02 Jan 2010 05:37:05 -0000
T-Shirts & Apparel : pi*z*z*a. Equal to its volume. Loved it! http://tinyurl.com/yfewgcw
A Common Book of Pi - Includes a brief history, a page with different formulas and a list of references.
A Slice of Pi Home Page - Features an historic overview of the discovery and estimate methods of pi. formula expressions, and the first 100,000 digits. Some pages use a Geometer's Sketchpad program.
A Tribute to Pi - Club and information.
Ancient Pi: Knowers of the Universe - The concept of pi refers to the constant ratio of the diameter:circumference of any circle; irrespective of the number of degrees contained within that circle. An article in the Science in Ancient Artwork-Series by Charles William Johnson.
Meta Description: [ the concept of pi refers to the constant ratio of the diameter:circumference of any circle; irrespective of the number of degrees contained within that circle. ]
Archimedes' Approximation of Pi - Describes the method introduced by Archimedes for aproximating Pi.
Archimedes' Constant - Information about the constant and some mathematical discussion of the effects.
Meta Description: [ This website aims to show that there are many constants in mathematics other than just e and pi! ]
Ask Dr. Math - Pi - Dr Math answers over 60 questions submitted by people about pi including questions on the Bible's relationship to it and its relationship to trigonometry.
Ask Dr. Math: About Pi - Explains what the constant is and a brief history. Includes resource links.
Meta Description: [ What is Pi? Who first used Pi? How do you find it? What is it for? How many digits is it? ]
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Bailey on Pi - Briefly explains David Bailey's work with NASA's supercomputers and the development of a workable formula to evaluate Pi for any number of decimal places.
Buffon's Needle - An analysis of its relation to Pi and a simulation by George Reese.
Calculating Pi - An open source endeavor for the calculation of this constant. Describes the project, the implemented algorithms for calculatinon and software downloads.
Meta Description: [ The open source project for calculating Pi. ]
Earth Mysteries : Notes on Pi (¼ ) - An introduction to the number Pi and its history.
Elias' Pi Page - Includes Pi in the Binary number system, Pi as a sound file and Pi shown in different images.
Fabrice Bellard's PI page - Showcases digit extraction and FFT multiplication algorithms.
Fun With Pi - A Topica email list. Archives readable by anyone.
Greg's Page of Pi - Includes introduction to Pi, 3 pieces of Pi art and links.
History and Philosophy of Pi - Probably no symbol of infinity in mathematics has evoked as much mystery, romanticism, misconception and human interest as the number and Greek letter of Pi. Interesting facts and trivia about Pi.
Meta Description: [ 3.1415926535 - history, mystery, facts and philosophy of Pi the infinite irrational mathematical number. ]
How Stuff Works: Pi - Animated graphic helps to explain Pi and the different ways of calculating Pi, with some related links.
Meta Description: [ A fascinating article that explains Pi and different ways of calculating Pi! ]
Indiana Pi Bill - Bill proposing new value of pi.
Is Pi normal? - An article by Stan Wagon about the idea of normality, first introduced by E. Borel in 1909, is an attempt to formalize the notion of a real number being random.
Lucy Scale Developments - Pitch, Pi, and other musical paradoxes.
Meta Description: [ Play the harmonics that you hear! Complete midi, fretting, scales, instructions. ]
One Billion Digits of Pi - Ramanujan, modular equations, and approximations.
Paul's Page of Pi - Includes introduction on why people would want to calculate Pi, four methods for calculating it, over 8000 digits, poems and music.
pi - A text that tries to prove that pi is 3.1416 exactly.
Meta Description: [ The real nature and the hyperbatic approach of universal constant pi (3.1416), by Moschos Ath. Karagounis ]
Pi 3.1416 - Mathematics as the language of nature.
Meta Description: [ The study of Pi. Mathematics is the language of nature.
Everything around us can be represented and understood through numbers. ]
Pi Approximation Day - 22/7 - that is, July 22. For the past few years, people at Chalmers University have celebrated it.
Pi Land - Fun activities, a Pi trivia game and a Trainer for digit memorization. Pi poetry, artwork, and photography, calculations, digits and book reviews.
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pi Mathematics - Teacher resources, history, activities, and information.
Pi Memorama - Includes a program that teaches Pi for the Mac, a page on why people learn to recite Pi and pages on how to memorise Pi.
Pi Memorize - A free windows application used to help memorize the number Pi to 10000 digits.
Pi Patterns - Images and illustrations created by using the digits of the circle constant.
Pi Shop - Provides accessories with Pi-Prints on them. Shirts, mugs and bags.
Meta Description: [ This shop is designed for the geek inside all of us! It speciallizes in Pi merchandise and acoutremonts to everyone's ]
Pi Through the Ages - History.
Pi World Ranking List - Every sport has its championship. Every sport has its world ranking list. For many who like to memorize numbers, PI is the ultimate number, and it makes sense to create a list for people to get in touch and learn where they stand in the world of memorizers.
Meta Description: [ world ranking list for people who like to memorize pi and want to see where in the world of memorizers they stand ]
Pi, Pi, Mathematical Pi - Parody of the song Bye Bye Miss American Pie elaborating on the history of pi.
Meta Description: [ Stephen Toner, Mathematics Instructor at Victor Valley College, home page ]
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Randomly Distributed Slices of pi - An article by Charles Seife about how mathematicians slowly circle in on a proof that pi's unpredictable digits really are as random as they seem.
Science News Online: Pi à la Mode - An article describing a potential link between two disparate mathematical fields-number theory and chaotic dynamics-that could lead to a proof that every digit of pi occurs with the same frequency.
Meta Description: [ A potential link between two disparate mathematical fields—number theory and chaotic dynamics—could lead to a proof that every digit of pi occurs with the same frequency. ]
The 1000 billionth binary digit of PI is '1' ! - Announcement of the 1000 billionth digit of Pi.
The Constant Pi - History, formulae, algorithms, programs, records of computation, and references.
The Friends of Pi Club - Fans of this important mathematical constant offer club information and resource links.
Meta Description: [ The number pi is a mystery. Pi's nature
has preoccupied mathematicians since ancient greece. As we know today, it
is impossible to square the circle. However, it's possible to enjoy pi,
its beauty and mystery. ]
The Joy of Pi - Book, digits, links, facts, and quote.
The Magic Piworld - Provides generated pictures and personal signs out of digits of Pi. Also a Picture Gallery, PiSign, PiPhonie.
Meta Description: [ JVSchmidt und Hael Yxxs präsentieren Magic Piworld: eine Welt voller Überraschungen rund um die Kreiszahl Pi ]
The Pi Pages - Information on Pi, its history, its future, and the people involved in its calculations.
The Pi Trivia Game - History, math, and physics questions.
The Ridiculously Enhanced Pi Page - Information on links for Pi Day.
The Uselessness of Pi and its Irrational Friends - Clubs, links, memorizing technique, records, art, and programs.
Meta Description: [ MetaCrawler Metasearch. ]
Your Piece of the Pi - This site describes pi's history, characteristics, and application. It also includes a distributed computing application for finding a large number of digits.
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