What would happen if there was no cylinder circumference in the world? Details are as follows:

First of all, a brief introduction.

There will be a situation where pi is completely calculated, which will inevitably lead to the collapse of the original "mathematical building", and the corresponding mathematical logic and the inherent principles of many geometric principles will be broken.

Second, pi.

1, pi refers to the ratio of the circumference to the diameter of a circle, that is, pi = the circumference of a circle ÷ the diameter, which is generally expressed by the Greek letter π, and is a common mathematical constant in mathematics and physics. π is also equal to the ratio of the square of the area and radius of a circle, that is, π = the area of a circle ÷ radius 2 is the key value to accurately calculate the geometric shapes such as the circumference of a circle, the area of a circle, the volume of a sphere, etc.

2. In the analysis, π can be strictly defined as the smallest positive number x satisfying sinx=0. Pi is written in the Greek letter π (pronounced [pa? ]), which is a constant (approximately equal to 3. 14 1592654), is the ratio of circumference to diameter. It is an irrational number, that is, an infinite cycle decimal. In daily life, pi is usually expressed as 3. 14, which is used for approximate calculation.

3. Generally, nine decimal places of 3. 14 1592654 are enough for calculation. Even if engineers or physicists want to make more accurate calculations, they only need to take the values to a few hundred decimal places at best.

Third, characteristics

1, it is of little practical significance to calculate the value of pi so accurately. A dozen pi values used in modern science and technology are enough. If the Hubble volume is calculated by using the 39-bit precision pi value, the error is less than the volume of an atom.

2. In the past, people calculated pi in order to explore whether pi circulated decimals. Since Lambert proved that pi is irrational in 176 1 and Lin Deman proved that pi is transcendental in 1882, the mystery of pi has been uncovered. π plays a very important role in many fields of mathematics.