Happy Pi Day πŸŽ‰Ο€πŸŽ‰

March 14 is Pi Day, an annual celebration of the mathematical constant pi (Ο€), the ratio of the circumference of a circle to its diameter.
The symbol was first used in mathematical calculations by Welsh mathematician William Jones and later it was popularized by Swiss mathematician Leonhard Euler, who adopted it in 1737.
However, the numerical relationship between a circle’s diameter and circumference has been considered since antiquity.
The Babylonians (c. 2000 BC) used 3.125 to approximate pi, while the Egyptians 3.160. In the Bible the bowl in King Solomon’s Temple used for ablution of the priests had a diameter of 10 cubits and a circumference of 30 cubits which places the ratio at 3.

Its value is often rendered as 3.14 but that is an approximation. The real value of pi is 3.1415926535 followed by a string of digits that goes indefinitely, because it is an irrational number. In its endless stream of digits, pi is believed to contain the numbers 0 through 9 in every imaginable combination, also our phone number, social security number, ATM…

Pi Day is held on March 14 because in the American date format it is 3/14. In addition, it is Albert Einstein’s birthday… and physicist Stephen Hawking β€” considered by some to be Einstein’s intellectual successor β€” died on March 14, 2018.

Pi Day started in 1988 at the San Francisco Exploratorium, where the first official celebration was organized by physicist Larry Shaw.

Pi Day may be observed by eating pie, to celebrate the pun as the two words are homophones (they sound the same) and many pies have a circular shape.

Image: Wikimedia Commons, – Matman from Lublin -Apple pie Pi Day

86 thoughts on “Happy Pi Day πŸŽ‰Ο€πŸŽ‰

  1. Buongiorno Luisa πŸ˜€ che notizia interessante.. ripenso in questo modo a tutti i debiti in matematica presi ahahahaah (sempre recuperati perΓ² eh!) πŸ˜€ molto interessante il post. Buona giornata😚😚😚

    Liked by 2 people

      1. Uuuu.. quanto apprezzo chi si diverte con i numeri 🀭 proprio perchΓ© sono incapace πŸ˜‚. accetto! 🍰 per tutti!🌻

        Liked by 3 people

  2. Hello Luisa Ji
    Whoops why because again blog post same thingsπŸ˜… here, after time okay but nice post with information about that ( Pi day )πŸ‘celebration.
    Thanks for this. 😊
    Happy Women’s Days!🌿🎡

    Liked by 2 people

  3. A fun and informative post. On a parallel note, since pi is an irrational number and goes on forever, I wonder if that is why some of our politicians want to have a slice of the pi because they are irrational and can yack or remain in office for what seems like forever.

    Liked by 4 people

  4. En France, nous avons un moyen mnΓ©motechnique pour retenir les dΓ©cimales de PI.
    “Que j’aime Γ  faire apprendre un nombre utile aux sages…”
    En prenant le nombre de lettres de chaque mot, on trouve 3 1 4 1 5 9 2 6 5 3 5 …
    Avez-vous une telle phrase en Italie ?
    Buon pomeriggio, Luisa.

    Liked by 3 people

  5. Fantastica la torta pi-greco, πŸ‘. Non conoscevo questa celebrazione. In matematica era un’autentica schiappa: Γ¨ una materia che non mi Γ¨ mai piaciuta. Per fortuna che compensavo i brutti voti che prendevo in questa materia con voti abbastanza alti in materie come italiano, inglese, ecc

    Liked by 2 people

      1. Avevi voti alti? Sai, come si dice sempre: quando una materia piace si studia anche piΓΉ volentieri e quindi si va bene sia nelle verifiche scritte che nelle interrogazioni. Il momento di fare i compiti in matematica era sempre problematico perchΓ© era come se il mio cervello decidesse di andare a β€œfare due passi”, 😁.

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