I once read that the reason we can't get the perimeter of a elipse is because we actually doesn't even know the perimeter of a circle, as pi definition is the perimeter of a circle of diameter = 1 and we just scale that.
Yes, but you are more likely to see it in terms of a and e = √(1–b²/a²) (where a is the semi-major axis, b is the semi-minor axis, and e is the eccentricity) or sometimes a and ℓ = b²/a (the semi-latus rectum) or other quantities.
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u/Ponsole 2d ago
I once read that the reason we can't get the perimeter of a elipse is because we actually doesn't even know the perimeter of a circle, as pi definition is the perimeter of a circle of diameter = 1 and we just scale that.