I believe you are no stranger to PI, & PI; The existence of is a miracle in itself. It is the ratio of the circumference of a circle divided by its diameter. No matter how large a circle is, the ratio of its circumference to its diameter is always a fixed number. 3. 141592653589793... People can't write all the numbers completely and accurately, so they use the Greek letter & PI; It is infinitely acyclic, so it is called an irrational number.
Who invented Pi?
PI was not invented by one person, but calculated by different mathematicians countless times in the process of history.
Archimedes, the great mathematician of ancient Greece, pioneered the theoretical calculation of the approximate value of PI in human history.
Around 480 ad, Zu Chongzhi, a mathematician in the northern and Southern Dynasties, actuaried the 'Pi' to the seventh decimal place for the first time, that is, between 3.1415926 and 3.1415927.
PI is usually written in Greek letters & PI; Means, read as P & agrave; i. It is a universal mathematical constant in mathematics and physics.
π It is also equal to the ratio of the area of the circle to the square of the radius. It is the key value for accurately calculating the circumference, area and volume of the circle.
It is an irrational number, that is, an infinite non cyclic decimal. In daily life, it is usually calculated approximately by using 3.14 to represent the PI. The ten decimal places of 3.141592654 are also sufficient for general calculation.
Top 100 pi
3. 1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679
PI is the ratio of the circumference of a circle to its diameter. It is generally written in the Greek letter & PI; Representation is a mathematical constant that exists widely in mathematics and physics& pi; Also equal to the ratio of the area of the circle to the square of the radius.
In 2011, in order to commemorate Zu Chongzhi, a great mathematician in ancient China, the International Mathematics Association set March 14 as the International Mathematics festival every year. He is the first person in the world to actuary the 'Pi' to the seventh decimal place, that is, between 3.1415926 and 3.1415927. His' ancestral rate 'has made great contributions to the research of mathematics. Until the 16th century, the Arab mathematician Al & middot; Cassie broke the record.
The first initiative to establish Pi Day was the Massachusetts Institute of technology. In 2009, the U.S. House of Representatives passed a resolution to set March 14 as' Pi Day 'every year. All people obsessed with PI celebrate their festival on March 14, precisely at 1:59 p.m. (314159). Some 24-hour timekeepers will celebrate at 1:59 a.m. or 3:9 p.m. (15:9 p.m.).
Now it is usually celebrated at 1:59 p.m. to symbolize the six digit approximate value of Pi of 3.14159, sometimes even accurate to 26 seconds, and to symbolize the eight digit approximate value of Pi of 3.1415926; People who are used to 24-hour timekeeping celebrate at 1:59 a.m. or 3:9 p.m. (15:9). Some university mathematics departments around the world hold parties on this day.
Zu Chongzhi
Zu Chongzhi (429-500) has a long history. Born in Jiankang (now Nanjing), his ancestral home is Qiu county, Fanyang county (now Laishui County, Hebei Province), an outstanding mathematician and astronomer in the northern and Southern Dynasties of China.
Zu Chongzhi devoted his life to natural science, and his main contributions were in mathematics, astronomy, calendar and mechanical manufacturing. On the basis of exploring the accurate method of PI pioneered by Liu Hui, he actuaried the 'Pi' to the seventh decimal place for the first time, that is, between 3.1415926 and 3.1415927. His' ancestral rate 'has made a significant contribution to the research of mathematics.
Until the 16th century, the Arab mathematician Al & middot; Cassie broke the record. The Daming calendar written by him was the most scientific and progressive calendar at that time, which provided a correct method for future astronomical research. His main works include an Bian Lun, conjugation, Shuyi Ji, Li Yi, etc.