Like, it’s just a number why is it SO specific? Other than circles I can’t think of a use that pie has. Why would we create something that only has one use (that I know of) that is almost always simplified?
Pi is the ratio between a circle’s radius and it’s circumference. That means that it can be used to describe waves and other periodic behaviours. Anything that happens with a frequency can be described with Pi, so that’s sound and light and lots of places in control systems.
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