I roto i te China tawhito, ngā uara mō te π 3.1547 (tata ki te 1 AD), √10 (100 AD, tata ki te 3.1623), me te 142/45 (3rd century, tata ki te 3.1556). A tawhio noa te 265 AD, te Wei Kingdom mathematician Liu Hui hanga he polygon-e hāngai ana hātepe tātai iterative me te whakamahia te reira ki te 3,072-taha polygon ki te whiwhi i te uara o π o 3.1416. Liu i muri i waihanga i te tikanga tere o te tātai i te π me te whiwhi i te uara o 3.14 ki te 96-taha polygon, mā te tango painga o te meka e te rerekētanga i roto i te rohe o ngā polygons whai muri hanga he raupapa āhuahanga ki te take o 4. te Chinese mathematician Zu Chongzhi, a tawhio noa te AD 480, tātai e 3.159 π <0.10 (100 AD, tata ki te 3.16233), me te 142/45 (3rd rau tau, tata ki te 3.1594) A tawhio noa te 159 AD, i hanga e te Wei
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