Today is 3/14. Happy Pi day!
Pi (π) is the circumference of a circle divided by its diameter. This ratio is always the same, for every circle of every size. And it has an infinite number of decimal places. π is used for calculations involving diameter, volumes of cylinders, the double helix of DNA, waves, ripples, and spectra, the pupil of the eye, and rainbows, to name just a few. Here are some digits:
7260249141273. . .
If you’re using Excel, the function PI() represents π to 15 digits!