File:Circle in square with grid.svg

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English: A square with inscribed circle is subdivided into parts by a grid, illustrating an ancient method of calculating a circular area by approximation. As demonstrated in the Rhind Papyrus (book II, problem 48), 1550 BC. The area of a circle is estimated as nearly 64/81 of a square, which sidelength equals the diameter. Using this method, the number pi is approximated by (16/9)^2 = 256/81 ≈ 3.16049, an error of only 0.01890 respectively 0.6 percent compared to π ≈ 3.14159.
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current09:58, 17 May 2016Thumbnail for version as of 09:58, 17 May 2016724 × 724 (597 bytes)Sarang (talk | contribs)disgarbaged to ½ %
16:16, 27 January 2011Thumbnail for version as of 16:16, 27 January 2011512 × 512 (118 KB)R*elation (talk | contribs){{Information |Description ={{en|1=A square with inscribed circle is subdivided into parts by a grid, illustrating an ancient method of calculating a circular area by approximation. As demonstrated in the Rhind Papyrus (book II, problem 48) copied by A

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