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A%20few%20facts%20about%20the%20mathematical%20constant%3A

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-%20Physicist%20Larry%20Shaw%20started%20celebrating%2014%20March%20as%20Pi%20day%20at%20a%20science%20museum%20in%20San%20Francisco.%20There%20he%20is%20known%20as%20the%20Prince%20of%20Pi.

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-%20Givenchy%2C%20the%20perfume%20brand%2C%20sells%20a%20men%u2019s%20cologne%20with%20the%20name%20%u2018Pi%u2019.%20It%20attracts%20the%20customers%20in%20the%20name%20of%20visionary%20men.

-%20The%20Greek%20letter%20%u03C0%20is%20the%20first%20letter%20of%20the%20word%20periphery%20and%20perimeter.

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