Happy Pi Day!


The history of pi dates back to the ancient Babylonians and Egyptians. Babylonians estimated pi as 3.125, and the Egyptians approximated pi to be 3.1605. However, it was the Greek mathematician Archimedes that calculated pi to be between 223/71 and 22/7. A general estimate for pi is 22/7 or 3.14.

In 1706, William Jones was the first to introduce a Greek letter for pi, which was later adopted by the mathematician Euler to represent the ratio between a circle’s circumference to its area. Later mathematicians extended the number of decimal places in this irrational number through rigorous calculations. In the computer age, pi has been estimated to its two-quadrillionth digit.

Some mathematical problems that feature pi are the area of a circle, a circle’s circumference, arc length and the different surface area and volume formulas for a cone, sphere and cylinder. In mathematics, the ratio between a circle’s circumference and diameter is given as pi.


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9 Responses to Happy Pi Day!

  1. G-d&Country says:

    Oops! Forgot my Pi Day photo! This is a ‘Triple Berry Pi Pie’ from Pillsbury!

    🙂 YUM!

    Liked by 4 people

  2. Sharon says:

    I sure couldn’t carry on a conversation about Pi, but it’s kind of like looking at the stars on a dark night…gives my brain a chuckle just to know it’s there.

    Liked by 2 people

  3. joshua says:

    cake are square
    pi are round.

    Liked by 2 people

  4. Col.(R) Ken says:


    Liked by 1 person

  5. John Denney says:

    1 Kings 7:23 implies that pi is 3, much to the delight of critics.

    “Now he made the sea of cast metal ten cubits from brim to brim, circular in form, and its height was five cubits, and thirty cubits in circumference.”

    I would ask how tight the tolerances have to be for this structure.

    Also, if the walls were about 1/4 cubit thick and internal diameter of about 9.5 cubits would render an internal circumference of 30 cubits (surface of the water) and an external diameter of 10 cubits.

    “It was a handbreadth thick” – 1 Kings 7:26


  6. lovely says:

    We have Key Lime, Apple and Door County Cherry tarts from our local bakery which had a sale on them today in honor of Pi Day!

    Liked by 3 people

    • joshua says:

      I remember playing the game with the baby…

      pee pi…….


    • At work tonight we had cherry, apple, blueberry, and coconut creme, all made by the owner’s mom, who prints our paychecks. We’ll be catering their 50th anniversary party at our event center this Friday. Should be about 200 people.

      Which reminds me, my mom and dad’s is coming up in a couple of years.

      Liked by 2 people

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