Because it can't be written as any fraction with
whole numbers on both the top and bottom.
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The number pi, which is approximately 3.14159265..., is an irrational number.
pi is real, irrational and transcendent; it is not rational, complex, nor an integer.Yes, it is non-terminating and non-repeating.Yes, pie is an irrational number.
Johann Lambert proved that pi is irrational in 1761.
The sum of a rational and irrational number must be an irrational number.
Only 5*pi is irrational.