Happy Late Pi Day!

Happy Pi Day!

On March 14 lies a savory pie that math enthusiasts and not only math enthusiasts celebrate Pi day 3/14. Whether it's apple pie, custard, or cream everyone around the world is welcome to celebrate. A physicist at San Francisco's Exploratorium named Larry Shaw marked how March 14 reflected the first three numbers of pi which is 3.14. And funny enough it is also Albert Einstein's birthday. 

 But first, what is Pi? 

 Pi is used almost everywhere from physics to engineering. It is the ratio of a circle circumference to its diameter, written as π or the number 3.14. The symbol π was chosen by a mathematician, William Jones and came from the word periphery in the Greek alphabet. It is an irrational number means its numbers are infinite and doesn’t repeat. When was pi first calculated? It went all the way back to ancient Babylonians, around 4,000 years ago. They knew the perimeter of a hexagon in a circle was equal to six times its radius. Using this number 3.125 was to approximate the number of pi. Then the ancient Egyptians continued updating the value to 3.1604. Over these centuries many mathematicians extended the number of pi. And by the late 17th century showed a new way of calculating pi which was the infinite series one example is when Isaac Newton used the binomial theorem to get 16 decimal places and another famous mathematician Srinivasa Ramanujan has other ways of calculating pi which is now used in computer algorithms.

_References

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_{https://apnews.com/article/pi-day-math-deals-march-14-ca302b43d7f64acaf6a234f4206206a1 https://www.sciencealert.com/its-pi-day-heres-why-this-special-number-gets-a-global-celebration https://news.clemson.edu/what-you-need-to-know-about-pi-the-number-not-the-kind-we-eat/ https://www.britannica.com/science/circle-mathematics https://www.nationalgeographic.com/science/article/150313-pi-day-century-celebration-math-culture-science}