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>> Interesting fact: In elliptic geometry, pi is less than arcsine 1. In
>> hyperbolic geometry, it's more than arcsine 1.
>
> I don't think this is true -- pi is defined in Euclidean space.
OK, I rephrase: In non-Euclidian space, the ratio of a circle's
circumfirance to its diameter can be made arbitrarily large or small.
--
http://blog.orphi.me.uk/
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