The infinite life of pi

This is a video about the number PI.

The ratio of a circle’s circumference to its diameter is always the same: 3.14159… and on and on (literally!) forever. This irrational number, pi, has an infinite number of digits, so we’ll never figure out its exact value no matter how close we seem to get.

Reynaldo Lopes explains pi’s vast applications to the study of music, financial models, and even the density of the universe.

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