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Piday.org is the official web site for March 14th (3.14). Learn about pi, shop for pi t-shirts, share ideas about how to celebrate pi & pi day, e...

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pi to a whole buncha digits http://keithschofield.com/pi/std.html

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Διδάσκομαι και διδάσκω Φυσική. Ελένη Παλαιολόγου

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