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Aug 16, 2022 at 11:34 comment added Peter Taylor If you have a precise compass then you can measure a distance of $2^n k$ and halve it $n$ times using the standard compass and straight edge construction to get a measurement of $k$ with an error of $2^{-n}$ mm.
Aug 16, 2022 at 9:16 history asked user3653831 CC BY-SA 4.0