20 Surprising Pi Facts For Kids – With Free Printable

Get ready to celebrate National Pi Day with the best pi facts for kids. These facts about the number pi, which will no doubt surprise both children and adults, are truly intriguing and fascinating.

National Pi Day is an annual celebration of the mathematical constant π (pi). It is celebrated on March 14 and is often accompanied by activities such as math competitions and pie-eating competitions in schools and universities.

Facts about the number Pi

1. Pi Day was first celebrated on March 14, 1988.

The first celebration was organized by mathematician and physicist Larry Shaw at the Exploratorium in San Francisco.

2. March 14 was chosen as Pi Day because this date symbolizes the number 3.14, which is the value of Pi.

3. Pi Day coincides with Albert Einstein’s birthday.

March 14 is also the birthday of the famous physicist Albert Einstein, which adds another meaning to Pi Day. Einstein was born in 1879 and made significant contributions to mathematics and physics.

4. The first calculation of the number π was made by Archimedes from Syracuse in 287–212 BC. there are.

The Greek mathematician Archimedes calculated the approximate area of ​​a circle by drawing a regular polygon inside and around the circle. Thus, he found that the number pi lies between 223/71 and 22/7.

5. Pi is an irrational number.

There are an infinite number of non-repeating digits of pi, making it an irrational number. The Swiss-German mathematician and astronomer Johann Lambert proved that the number pi is irrational.

6. The irrational number pi has been calculated to 105 trillion digits

As of 2024, American computer storage company Solidigm holds the record for calculating the largest number of digits in pi. It took 75 days and up to 1 million gigabytes of data to calculate this value.

Quick Tip: Share a good laugh with Pi jokes!

7. The Guinness World Record for the largest number of memorized signs after the decimal point of Pi is 70,000 digits!

On March 21, 2015, blindfolded Rajveer Meena recited 70,000 digits of Pi during a 10-hour lecture at VIT University in Vellore, India.

8. National Pi Day was established in 2009.

In 2009, the US House of Representatives officially passed a resolution declaring March 14 as National Pi Day to promote math and science education.

9. Pi has been around for over 4,000 years!

The ancient Egyptians and Babylonians knew about this constant long before that! It is believed that the pyramids of Giza were built using the number Pi, because the ratio of the vertical height of the pyramids to the perimeter of their base corresponds to the sequence of Pi numbers.

10. The Pi symbol was introduced in 1706.

The introduction of the symbol π is attributed to the Welsh mathematician William Jones. The symbol comes from the Greek language

11. NASA uses only 16 digits of Pi.

That’s 3.141592653589793! According to the space agency, this value of Pi is quite sufficient for calculations concerning the solar system and its space environment.

12. NASA is a fan of Pi Day!

NASA is celebrating Pi Day with events and a Pi Challenge competition for students.

13. Pi is also known as Archimedes’ constant, Ludolf’s number, and the circular constant.

Pi is the ratio of the length of a circle to its diameter. Denoted by the Greek letter π, this ratio is always 3.141, regardless of the size of the circle.

14. March 14, 2015 was the Pi Century Day!

Since the date (3/14/2015) corresponded to the first five digits of Pi (3.1415), it was a very special day indeed! Some have gone even further, celebrating the holiday at 9:26:53 a.m. to represent the first 10 digits of Pi (3.141592653).

15. Pi Day at 1:59 PM is a real event!

Many people celebrate Pi Day at 1:59 PM to represent the first six digits of Pi (3.14159) and make the celebration even more exciting!

16. There is also Pi Day!

It is rightly celebrated on July 22 to commemorate the common fraction 22/7 used to approximate the number pi.

17. Pi is a computer stress test.

Oddly enough, the calculation of Pi is used to test the performance of a computer’s processor.

18. Larry Shaw is affectionately known as “Prince Pi”.

19. It is a tradition to eat pies on Pi Day.

Many people celebrate Pi Day by feasting on pies and pizza to their heart’s content!

20. The famous British astrophysicist Stephen Hawking died on the day of Pi.

Interesting facts about the number Pi

Source: Amazing Pi Facts for Kids