# Pi Day Countdown #14 – in search of Pi

It is unclear when the first approximations of $\pi$ were made, approximations can be found as early as the Ancient Babylonians.  As old as $\pi$ may be, attempts at approximating $\pi$ is still relevant today.

The Greeks and Chinese had approximated $\pi$ using Geometric techniques. Yet as ingenious as these techniques are, they were only able to approximate $\pi$ with around 7 digits.

With the advent of more powerful mathematics, functions known as infinite series were created that could give the exact value of $\pi$, if the steps of the function were done infinitely. However, it isn’t until the invention of computing machines that the number of digits of $\pi$ known exploded.

As of 2014, $\pi$ has been approximated to 13 trillion digits.

Happy Pi Day

PS: For more Pi Day countdown articles, visit the fun corner

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