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| | Pi Day is celebrated by some mathematicians on March 14 at 1:59 (in the American date system 3/14; first digits of π = 3.14159). Usually, Pi Day is celebrated at 1:59 PM (in 12-hr format), but according to 24 hr format, it is 13:59 and hence, Pi Day is preferred to be celebrated at night.
On this day, lauding speeches in the honor of number Pi are addressed applauding its roles in life of mankind. Other popular activities on the Pi Day are drawing the Pi symbol, figures of the world without Pi, eating Pi-shaped pies, drinking and playing the games beginning with P.
Albert Einstein was born on the 14th March.
Pi Approximation Day is also celebrated on the 22nd of July (22 / 7).
Number Pi mathematical constant, expressing the relation of length of circle to length of its diameter. It is designated by Greek alphabet Pi.
For the first time, Pi appeared in geometry as relation of length of circle to length of its diameter, however, it also appears in other bracnhes of mathematics. Number Pi is irrational and transcendental.
For the first time, Greek letter Pi was used by British mathematician William Jones (1706) but is widely accepted after the works of Leonard Euler. This designation occurs from initial letter of Greek words Piεριφέρεια circle, periphery and Piερίμετρος perimeter.
Archimedes, probably, offered the first method for calculating the Pi in a mathematical manner. For this, he inscribed a circle and circumscribed regular polygons near the circle. Accepting the diameter of circle as 1, Archimedes considered the perimeter of inscribed polygon as lower bound of length of circle and perimeter of the circumscribed polygon as upper bound. |
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