Number pi
- 1. NUMBER Pi
- 3. ~It’s defined as the ratio of the volume and circle diameter. ~Pi is also known as Archimedes' constant or Ludolf's number. ~It is written in a small Greek letter (π)and the mark for the number pi derives from the Greek word perimeter, which means the length of the curve that borders a plane. ~The symbol for pi (π) has been used regularly in it’s mathematical sense only for the past 250 years.
- 4. What is Pi in fact?
- 5. ~It's a constant. It's irrational. The value of the number π is rounded to 64 decimal places: π ≈ 3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 5923. ~However, as you know, in mathematics it is mainly used in the rounded form 3.14 or as a breakdown of 22/7.
- 6. It’s approximate value is 3.14159. We say that it is approximate because it has an infinite number of decimals, which mathematicians have been trying to calculate from ancient Greece to the present day.
- 8. ~"Pi Day" is celebrated on March 14th (Albert Einstein’s birthday). The official celebration begins at 1:59 p.m., to make an appropriate 3.14159 when combined with the date!
- 9. ~ Today there are lot of different types of arts that glorify Pi : pi - music, pi - poetry, pi - film ... ~Also, how much it has been intriguing to the public for centuries, the best shows celebrations in his honor. ~Otherwise, the day of the Pi number is marked in various ways, including competition in eating pies and discussing the significance of the number π. Some schools also organize competitions in which students are trying to remember as much as possible decimals of the Pi number.
- 10. ~The first one who decided to celebrate the day of the number Pi was physicist Larry Shaw in 1988. ~He circled with his colleagues in a circular hall at the Exploratorium Museum in San Francisco, after which they ate fruit cakes. ~Later years they ate pizza, and the only thing that mattered when they choosed meals, was that it was a round shape.
- 14. ~He developed a method of describing the correct polygons around the circle trying to calculate the circle area. ~This method is known as the method of exhaustion. ~What does this have to do with the number π ? So, the more sides it has, the proper polygon is the closer to the circle. And so Archimedes started to transform those sides in line. ~Exhaustion reached ninety-sixth and more precise estimates for the number π.
- 16. ~The Pi symbol has already entered history in ancient Egypt, since the earliest records referring to this number were found on the sheets of papyrus that occurred around 1650 BC. ~However, the first who actually calculated the number Pi was Archimedes, but since he was not yet aware of the decimals at that time, he expressed it in the form of a fragment. Since then, until the beginning of the 17th century, all mathematicians who calculated the number π (and there were many) made it to Archimedes' method. ~Since then, many mathematicians, with more or less success, have dealt with calculating the decimals of the number π. Everyone wanted to calculate it as precisely as possible, until the last decade. ~ It was only later understood that this was impossible because it was infinite.
- 17. Archimedes
- 18. In math, it was introduced by William Jones in 1707, and was popularized by Leonard Euler in 1737.
- 20. 1.To recite 6.4 billion decimals of the pi number, you would need 133 years of talking without pausing. 2.Some people believe that pi contains answers to questions about the infinity of the universe. 3.The record of the most decimated number of Pi is held by Fabrice Bellard. He calculated a pi to 2.7 trillion decimals on a regular desktop computer.
- 21. 4.In the first hundred thousand decimals of the number pi, number one is the most often repeated number. 5.The world record in the number of memorable decimals of the pi number hold Lu Chao. ~According to the Guinness Book of Records, he remembered 67,890 digits, which took him 24 hours and 4 minutes to recite.
- 22. Did you know that 3.14 percent of the sailors are actually Pi-rats?