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Pi, what could it be?

   The number "pi" expresses the ratio of the circumference to its diameter and is approximately equal to 3.14. The letter\pi~ it marked the first time a British mathematician William Jones in his work "Review of the achievements of mathematics" in 1706. His choice was due to the fact that it begins with that letter word περίμετρος - "Perimeter".[...]

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We are the ones who do not care about the lives of those around us. Especially children, who need a simple attention and participation.

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