Then, how does he deal with the the pentagon? because that needs sqrt(5+sqrt(5))... | Hacker News

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gus_massa on Aug 30, 2017 | parent | context | favorite | on: Don’t Fall for Babylonian Trigonometry Hype

Then, how does he deal with the the pentagon? because that needs sqrt(5+sqrt(5)) or something similar with two nested square roots.

jacobolus on Aug 30, 2017 [–]

To deal with pentagons you need to extend the field of rationals by an additional element. Wildberger is kind of ambivalent about finite field extensions.

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