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I mean, depending on your surface, it can be <pi (welcome to hyperbolic happy time), =pi (good old euclidean) or even >pi (three rights really does make a triangle on earth if you travel far enough).
I mean, depending on your surface, it can be <pi (welcome to hyperbolic happy time), =pi (good old euclidean) or even >pi (three rights really does make a triangle on earth if you travel far enough).