🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiSvenskaTürkçeРусский한국어中文日本語EntityQ2333151· pop 13· linked from 45 articlestauAlso known as τ, 2π, 2pi, two piratio of the circumference of a circle to its radiusWikidata factsImageTau-angles.svgvia Wikidata · CC0Available in 12 languagesEspañol中文日本語РусскийArmenianBanglaBasqueFinnishNederlandsPolskisimpleConnectionsPlanck constantEntityroot of unityEntityCategories1 (number)AngleMathematical conceptsPiUnits of plane angle