Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A tsohuwar kasar Sin, dabi'u don π sun hada da 3.1547 (kimanin 1 AD), √10 (100 AD, kimanin 3.1623), da 142/45 (karni na 3, kimanin 3.1556). A kusa da 265 AD, masanin ilimin lissafi na daular Wei Liu Hui ya kirkiro wani algorithm mai amfani da polygon kuma ya yi amfani da shi tare da polygon mai gefe 3,072 don samun darajar π na 3.1416. Liu daga baya ya ƙirƙira wata hanya mafi sauri don lissafin π kuma ya sami darajar 3.14 tare da polygon mai gefe 96, ta hanyar amfani da gaskiyar cewa bambance-bambance a yankin polygons masu biyo baya suna samar da jerin lissafi tare da kashi 4. Masanin ilimin lissafi na kasar Sin Zu Chongzhi, kusan 480 AD, ya lissafa cewa 3.1415926 < π < 3.1415627 kuma ya ba da shawarar kusancin π ≈ 355/113 = 3.14159292035... da π ≈ 22/7 = 3.142857142857..., wanda ya kira Milü (''kusan rabo') da Yuelü ("kusan rabo"), bi da bi, ta amfani da algorithm na Liu Hui da aka yi amfani da shi zuwa polygon mai gefe 12,288. Tare da madaidaicin darajar don lambobi bakwai na farko na goma, wannan darajar ta kasance mafi kusancin ƙididdigar π don shekaru 800 masu zuwa. Masanin ilimin taurari na Indiya Aryabhata ya yi amfani da darajar 3.1416 a cikin Āryabhaṭīya (499 AD). Fibonacci a cikin c. 1220 ya ƙididdige 3.1418 ta amfani da hanyar polygonal, mai zaman kanta daga Archimedes. Marubucin Italiyanci Dante a fili ya yi amfani da ƙimar 3 + √ 2 / 10 ≈ 3.14142. Masanin ilimin taurari na Farisa Jamshīd al-Kāshī ya samar da lambobi 9 na sexagesimal, kusan daidai da lambobi goma sha shida, a cikin 1424 ta amfani da polygon tare da bangarori 3 × 228, wanda ya tsaya a matsayin rikodin duniya na kimanin shekaru 180. Masanin lissafin Faransa François Viète a 1579 ya sami lambobi 9 tare da polygon na bangarori 3 × 217. Masanin lissafi na Flemish Adriaan van Roomen ya isa wurare goma sha biyar a shekara ta 1593. A shekara ta 1596, ɗan lissafi ɗan ƙasar Holan Ludolph van Ceulen ya kai lambobi 20, wanda daga baya ya ƙaru zuwa lambobi 35 (saboda haka, aka kira π "lambar Ludolphian" a Jamus har zuwa farkon ƙarni na 20). Masanin kimiyyar Dutch Willebrord Snellius ya kai lambobi 34 a shekara ta 1621, kuma masanin ilimin taurari na Austrian Christoph Grienberger ya isa lambobi 38 a shekara ta 1630 ta amfani da bangarori 1040, wanda ya kasance...  Tambaya: Viète ta samu lambobi nawa ta amfani da polygon mai yawan bangarori?
9 da kuma