# Celebrating PI π day – Facts, History and formulas

Hi all today we are celebrating a Pi day. If you don’t know what is is pi you will be knowing in this article. We are going to explore Interesting facts, history and some formulas. So get ready, today we are going to introduce the most famous irrational number in the world.

Today we are also celebrating birth anniversary of great physicist Albert Einstein so check out an Interesting article – https://knowledge-junction.in/2023/03/14/remembering-the-great-physicist-nobel-prize-winner-albert-einstein/

**What is Pi ?**

**pi**—which is written as the **Greek letter** for p, or **π**—is the ratio of the **circumference of any circle to the diameter of that circle**. Because pi is irrational (not equal to the ratio of any two whole numbers), its digits do not repeat, and an approximation such as 3.14 or 22/7 is often used for everyday calculations. **To 39 decimal places, pi is 3.141592653589793238462643383279502884197**. But their are infinite values of **pi**

But If you want to explore more Pi digits here you can check Knowledge Junction has provided 1 million digits of Pi π

**1 million digits of Pi π**

**Facts of Pi**

- Since the exact value of pi can never be calculated, we can never find the accurate area or circumference of a circle.
- The value of Pi was determined till a record-breaking 22 trillion decimal places in 2017.
- The calculation of the value of Pi can be used as a stress test for a computer processor.
- Pi Day was celebrated for the first time in 1988 by American physicist Larry Shaw.
- The Pi symbol was introduced by William Jones, a Welsh mathematician, in 1706.
- The number pi is literally infinitely long. But the number 123456 doesn’t appear anywhere in the first million digits of pi. It is a bit shocking because if a million digits of pi don’t have the sequence 124356, it definitely is the most unique number.
- Many mathematicians believe that it is more accurate to say that a circle has infinite corners than it is to say that it has none. It is only reasonable to assume that the infinite number of corners in a circle correlates to the infinite number of digits of pi.
- The number pi is very effective when you used in calculations For instance, rounding the number pi to just 9 digits after the decimal and use it to calculate earth’s circumference yield incredibly accurate results. For every 25,000 miles, the number pi will only err to 1/4th of an inch.
- Interestingly, some of the most famous scientists in the world have a connection to pi day. Albert Einstein was born on March 14th, 1879. Stephen Hawking died on March 14th, 2018 at the age of 76.
- We will never be able to find all the digits of pi because of its very definition as an irrational number. Babylonian civilization used the fraction 3 ⅛, the Chinese used the integer 3. By 1665, Isaac Newton calculated pi to 16 decimal places. Computers hadn’t been invented yet, so this was a pretty big deal. In the early 1700s Thomas Lagney calculated 127 decimal places of pi, reaching a new record. In the second half of the twentieth century, the number of digits of pi increased from about 2000 to 500,000 on the CDC 6600, one of the first computers ever made. This record was broken again in 2017 when a Swiss scientist computed more than 22 trillion digits of pi. The calculation took over a hundred days.

**History Of Pi**

**Why do we celebrate Pi day on 14th March?**

For people who follow the month/date format, March 14 represents the value of Pi. March is the third month of the year, which is also the initial number of the value. The following number is 14, hence the March 14 date. Maths enthusiasts across the world hold fun events on this day to mark the celebrations. They also eat pie as part of the celebrations due to the words being homophones in English (Pi and Pie) and circular shape.

**Where is Pi is used?**

In basic mathematics, Pi is used **to find area and circumference of a circle**. You might not use it yourself every day, but Pi is used in most calculations for building and construction, quantum physics, communications, music theory, medical procedures, air travel, and space flight, to name a few.

**Using Pi**

We can use **π** to find a Circumference when we know the Diameter

** Circumference = π × Diameter**

Also we can use **π** to find a Diameter when we know the Circumference

**Diameter = Circumference / π**

**Remembering The Digits**

I usually just remember “3.1415926535”, but you can also count the letters of:

**“May I have a large container of butter today”**

** 3 1 4 1 5 9 2 6 5**

Thank you for reading this article

Happy Pi day!!

Have a great day ahead 🙂🙂

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