Any big ratio fans out there? Events and activities are happening around the world to celebrate Pi Day.
History ofWhile not every society celebrates Pi Day, every civilization in recorded history that has a mathematics of circles discovered and used an approximation of pi. Pi is even alluded to in the Bible, though only approximately. King Solomon's construction of the Temple in Jerusalem is described in I Kings, including a detailed description of the"Molten Sea"—a massive cast metal basin built atop statues of 12 bulls.
Around 1600, pi was extended to 35 digits by German-Dutch mathematician Ludolph van Ceulen. He was so proud of his"Ludolphine number" that it was inscribed on his tombstone. Swiss mathematician and physicist Leonhard Euler, born 1707, formalized the use of the Greek letter π for pi—based on the Greek word for circumference,—following the symbol's usage by Welsh mathematician, and friend of Isaac Newton, William Jones.
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