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Pi can be proven to be an irrational number: https://en.wikipedia.org/wiki/Proof_that_%CF%80_is_irrational https://en.wikipedia.org/wiki/Proof_that_%CF%80_is_ir

• hi41 8y ago
  Quick question. Is 22/7 an approximate value of pie? What is the correct formula and why?
  • pmiller2 8y ago
    22/7 is an approximation for pi. I prefer to use 355/113, which has an error of about 2.7x10^-7. The reason these are good approximations is that they’re convergents for the continued fraction for pi. See https://en.wikipedia.org/wiki/Continued_fraction https://en.wikipedia.org/wiki/Continued_fraction