Pi Approximation Day 2025: What is it and why is it celebrated?

Pi Approximation Day occurs every July 22nd. It celebrates pi, a key mathematical constant. Pi relates a circle's circumference to its diameter. William Jones introduced the π symbol in 1706. Archimedes made early calculations of pi. Pi is vital in mathematics. Casual Pi Day reminds everyone of the value of Pi. Pi remains a memorable symbol for students. Read more below!

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