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Fermat's Library on Twitter: "Japanese calculus was developed independently in the 17th century by Seki Kowa. It was called yenri (circle principle). In this case the circle's area is measured by summing
who discovered pi and formula of Circumference? - Science and Hindu Religion
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Who invented Pi....? #maths #aryabhatta #mathematician - YouTube
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Discovery of Pi Ksenia Bykova. - ppt video online download
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