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Ryota Matsuura. “Approximating π Using Similar Triangles.” The Mathematics Teacher, vol. 105, no. 8, 2012, pp. 632–636., Accessed 22 Jan. 2021.
Ryota Matsuura. (2012). Approximating π Using Similar Triangles. The Mathematics Teacher, 105(8), 632-636. doi:10.5951/mathteacher.105.8.0632
Ryota Matsuura. "Approximating π Using Similar Triangles." The Mathematics Teacher 105, no. 8 (2012): 632-36. Accessed January 22, 2021. doi:10.5951/mathteacher.105.8.0632.

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