According to the website Angio, Pi (π) is the ratio of the circumference of a circle to its diameter. It doesn't matter how big or small the circle is - the ratio stays the same. Properties like this that stay the same when you change other attributes are called constants. Because it's so easily observed (you can measure it with a piece of string!), Pi has been popular for centuries.
Sooooo!.... Let us set aside some time today to celebrate everything that is constant - death, taxes, sunrises, sunsets, good friends, enemies, etc.
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