I think the ancient Egyptians had the concept albeit a rough approximation eg 22/7
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what Englishman introduced the pi symbol, and in what year
William Jones, in 1706
It was first introduced by the Welsh mathematician William Jones in 1706 and pi is the 16th letter of the Greek alphabet also it is the 1st letter of the Greek word for perimeter.
It was William Jones in 1706 and pi is the 16th letter of the Greek alphabet
The history of pi dates back to ancient civilizations, such as the Babylonians and Egyptians, who approximated the value of pi. The first accurate calculation of pi was made by the Greek mathematician Archimedes in the 3rd century BC. The symbol for pi was introduced by the Welsh mathematician William Jones in the 18th century, and it has since become one of the most important mathematical constants in mathematics.