For example pi(r)^2 For the area of a circle and 2(pi)r for the circumference of a circle.
I remember these formulas, but never conceptually grasped why we use a seemingly random number (22/7) and use it in various different formulas for various calculations.
someone ELI5 please.
In: Mathematics
Because many mathematical formulas have circles or spheres in them. Even when formula don’t looks like there’s any circle’s involved, if you see Pi appears in some formula – there’s something circular in it. Like, y^(2)+x^(2) = R this defines circle, though it could look like it’s has nothing to do with it, because there’s no sin or cos. And if you analyze this equation, you’ll see Pi. This is obvious example because we know that this equation defines circle, but in math there’s many not so obvious examples (I just don’t remember them…)
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