Pi is a concept put forward in modern times, so there are no related poems, but there are related limerick poems, as follows:
"One pot of wine in a temple at the top of the mountain (3.14159), children's music (26), I can't eat three pots (535897), and wine kills children (932)! You can't kill (384), but have fun (626). Forget it when you die (43383), and abandon the ditch (279). " [Top 3 ]
"I love my son (52), and it's sad enough to die in vain (8841971), leaving it to the ravine (69399)." [15th place ]
"I have low back pain (3751), and I'm afraid you'll be frozen for a long time (5829), and you'll think about it for a long time (74944)." [15 ]
I rescued my son (592) and turned to the cave (37), so it is not advisable to stay (816). Neighbors are happy (46), children are unhappy (286), and children love their father for a long time (2899). Dad Le Er doesn't understand (8628). Think twice (348)!' Children realize (25). Think twice and say goodbye (34211), but a wife enjoys waiting for a long time (7679). [the last 4 digits ]
: pi
pi, generally expressed as π, is a mathematical constant that exists universally in mathematics and physics. It is defined as the ratio of the circumference to the diameter of a circle. Its pi is also equal to that ratio of the area of a circle to the square of its radiu. It is the key value to accurately calculate the geometric shapes such as circle perimeter, circle area and sphere volume. In analysis, π can be strictly defined as the smallest positive real number x satisfying sin(x) = . In June 211, some scholars thought that the definition of pi was unreasonable, and asked to change it to 6.28.
π is the 16th Greek letter. Originally, it has nothing to do with pi, but since 1736, the great mathematician Euler has used π to express pi in letters and papers. Because he is a great mathematician, people have followed suit to express pi. But π can be used to represent other things besides pi, and it can also be seen in statistics. π=Pai(π=Pi) The ancient Greek Euclid's Elements of Geometry (about the beginning of the 3rd century BC) mentioned that pi was a constant, and China's ancient arithmetic book Zhouyi Shujing (about the 2nd century BC) recorded that pi was a constant.
many approximations of pi have been used in history, and most of them were obtained by experiments in the early days, such as taking pi = (4/3) 4 ≒ 3.164 from ancient Egyptian papyrus (about 17 BC). The first person to seek the value of pi by scientific methods was Archimedes. In The Measurement of Circles (3rd century BC), he determined the upper and lower bounds of the circumference of a circle by using the circumference of a regular polygon inscribed in and circumscribed by a circle. Starting from a regular hexagon, he multiplied it to a regular 96-sided polygon and got (3+(1/71)) <; π< (3+(1/7)), created a geometric method for calculating pi (also known as classical method or Archimedes method), and got the π value accurate to two decimal places.
when Liu Hui, a mathematician in China, annotated Nine Chapters of Arithmetic (263), he only used a circle inscribed with a regular polygon to get the approximate value of π, and also got the π value accurate to two decimal places. His method was called cyclotomy by later generations. He used the cyclotomic technique until the circle was inscribed with a regular 192-sided polygon, and obtained the π ≈ radical number 1 (about 3.14).