pi
Constant ratio of the circumference of a circle to its diameter
Also known as Archimedes' constant · π · pi number · ratio of circumference to diameter · 3.14... · tau over two
- Instance of
Overview
All data
102 statements · 14% with external sources · numbers in brackets are citations
- Numeric value
- 3.1416 applies to part: Euclidean distance · sourcing circumstances: possibly approximate value
2
Sources- 1.“First 100 digits”math.com/tables/constants/pi.htmRetrieved 2014-02-26
- 2.“Decimal expansion of Pi (or, digits of Pi)”oeis.org/A000796Retrieved 2015-02-21
- 3.14 sourcing circumstances: possibly approximate value · nature of statement: often · applies to part: Euclidean distance
- 4 applies to part: Chebyshev distance, taxicab geometry
- 3.1416 applies to part: Euclidean distance · sourcing circumstances: possibly approximate value
- TeX string
- \pi
- Different from
- Pi criterion used: descriptive page and disambiguation page have to be in different items · applies to name of subject: pi
- Pi greco criterion used: descriptive page and disambiguation page have to be in different items · applies to name of subject: pi greco
- Pī criterion used: descriptive page and disambiguation page have to be in different items · applies to name of subject: pī
- Name
- π(since 1706) named by: William Jones
1
Sources- 1.“Pi Day 2015: meet the man who invented π”theguardian.com/science/alexs-adventures-in-numberland/2015/mar/14/pi-day-2015-william-jones-the-welshman-who-invented-pi
- π(since 1706) named by: William Jones
- Less than
- 22/7 statement is subject of: proof that 22/7 exceeds π · criterion used: numeric value
- Named after
- circle applies to name of subject: Kreiszahl
- Ludolph van Ceulen applies to name of subject: Ludolphsche Zahl
1
Sources- 1.“Ludolph van Ceulen und die Ludolphsche Zahl”3.141592653589793238462643383279502884197169399375105820974944592.eu/die-geschichte-der-zahl-pi/ludolph-van-ceulen-und-die-ludolphsche-zahl/Retrieved 2023-08-12
- Ludolph van Ceulen applies to name of subject: Ludolfsche Zahl
1
Sources- 1.“Ludolph van Ceulen und die Ludolphsche Zahl”3.141592653589793238462643383279502884197169399375105820974944592.eu/die-geschichte-der-zahl-pi/ludolph-van-ceulen-und-die-ludolphsche-zahl/Retrieved 2023-08-12
On other databases
57 identifiers linking pi across the web's reference databases
- Archive of Our Own tagPi
- Australian Educational Vocabulary IDscot/7229
- BabelNet ID00062194n
- BBC Things ID6c60de15-f23d-4f2c-8afb-8d7cd7e78ffe
- BNCF Thesaurus ID6838
- Brilliant Wiki IDpi
- Cultureel Woordenboek IDwiskunde/pi
- Daum Encyclopedia ID61XX80200033
- Dewey Decimal Classification512.73
- Encyclopædia Britannica Online IDtopic/pi-mathematics
- Encyclopedia of China (Third Edition) ID (2026)378yFw
- Encyclopedia of China (Third Edition) old ID (2021)232847
- Encyclopedia of Mathematics article IDPi(number)
- Fandom article IDmath:Pi_(constant)
- Freebase ID/m/05wjw
- GitHub topiccalculate-pi
- GND ID4174646-6
- Gran Enciclopèdia Catalana IDnombre-pi
- Gran Enciclopèdia Catalana ID (former scheme)0153762
- Great Norwegian Encyclopedia IDpi
- Great Russian Encyclopedia Online ID (2017)4687097
- Great Russian Encyclopedia portal IDchislo-p-bf3bee
- J9U entity ID987007546007205171
- Krugosvet article (archived)nauka_i_tehnika/matematika/CHISLO_p.html
- Larousse IDdivers/pi/79570
- Lexikon der Mathematik entry ID5618
- Library of Congress Authorities IDsh85101712
- Mathlib Declaration IDReal.pi
- MathWorld IDPi
- Metamath statement IDdf-pi
- Microsoft Academic ID (discontinued)53009064
- Namuwiki ID원주율
- National Library of Latvia ID000186054
- National Library of Spain SpMaBN IDXX536170
- Naver Encyclopedia ID (pre-August 2026)3405254
- NDL Authority ID00562015
- NE.se IDpi
- NicoNicoPedia word article ID円周率
- NL CR AUT IDph117728
- NLab IDpi
- OEIS IDA000796
- Online PWN Encyclopedia ID3956528
- OpenAlex IDC53009064
- OpenMath IDnums1#pi
- Personality Database profile ID528862
- Pixiv Encyclopedia ID円周率
- PlanetMath IDPi
- ProofWiki IDDefinition:Pi
- Quora topic IDPi
- SVKKL authority ID0382633-Ludolfovo-cislo
- Treccani IDpi-greco
- UCUM code[pi]
- Vikidia article IDen:Pi_(math)
- Wellcome Collection concept IDmpm4r9yh
- WikiKids IDPi_(wiskunde)
- Yale LUX IDconcept/a9028d63-5a4b-4b17-901b-e17728f47a5d
- Zhihu topic ID19581830