Siku ya Pi : Tofauti kati ya masahihisho

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Mstari 1:
[[Image:Pi pie2.jpg|thumb|right|Keki ya Pi iliyoandaliwa kwenye chuo kikuu cha Delft (Uholanzi)]]
[[Image:prince-Larry Shaw, the founder of Pi Day, at the Exploratorium in San Francisco--pi2007 March 21.jpg|thumb|right|Larry Shaw mwanzilishaji wa sikukuu ya Pi pamoja na keki za sherehe]]
 
'''Siku ya Π''' (tamka: pi) ni sikukuu ya kusheherekea namba '''[[π]]''' ('''[[pi (namba)|pi]]'''). Husheherekewa na wanahisabati na marafiki wa [[hisabati]] duniani.