The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c8.t4.18
The Śulbasūtras of Baudhāyana, Āpastamba, Kātyāyana and Mānava: With Text, English Translation and Commentary c8.t4.18
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c8.t4.18
(ii) π = 4/(r²) = 3.0883......
where r = 1 + ⅓ (√2 - 1);
(iii) π = 4 ( 1 - ⅛ + 1/8.29 - 1/8.29.6 + 1/8.29.6.8 ) = 3.0885 ;
and (iv) π = 4 ( 1 - 2/15 )² = 3.004.