Was pi invented or discovered?

[Chas]

Erm, I can think of at least two base systems we use on a daily basis: binary (base 2) and hex (base 16). Computers use those all the time.

Those are not practical to the common man in every day life, yes they have great value, but our society thrives on 0-9. The metric system is based on 10 and the US measurement system is set up on sixteen for the most part, however that system is supported by 0-9.

And the number system has absolutely nothing to do with pi.

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The original question may be a false dichotomy.

Pi is calculated.

[little_monkey]

No, pi is a result from geometry: circumference/diameter = pi. However, the assumption is flat space. In positive curvature space, it is less than pi, in negative curvature space, it is greater than pi.