good point but it does have a line off the top left vertex going down to the left. the symbol above is slightly different than pi.
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William Jones first used the pi symbol (π) in 1706
William Jones, a Welsh mathematician, first used the pi symbol in 1706.
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The symbol comes from the Greek alphabet.
Pi Day can be celebrated by eating a pie, discussing topics related to pi, dressing in pi-ralated apparel, such as a shirt with the pi symbol on it, or doing anything else related to pi.