The concept of pi has been known by mathematicians for thousands of years whereas the circumference of a circle divided by its diameter is about 22/7.
However, the exact value of pi has never been discovered because it is an irrational number whose decimal places go on for ever and ever.
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Pi was discovered ny the ancient Greeks around 1900 B.C
aryabhatta discovered it as 3.1416
It is a decimal
The Welsh word for "pi" is "pi". The concept of pi remains the same in Welsh and is commonly referred to using the same term.
No one has fully discovered pi. Pi is believed to be irrational.