Approximation of pi based on sqrt(10)

[pier4r]

well wiktionary (or whatever wiki*) is as reliable as it gets. If someone as a better definition, be bold and put it in.

After enough iterations, it should be useful.

The drawback may be when "democracy" is applied to knowledge. In that case, well, the result could be not good enough. In those cases proper moderators/rules are needed. Wiki may miss moderators, but surely has enough rules.