Pi is also equal to the ratio of the area of a circle to the square of its radius. Accurate calculation of geometric shapes such as circle perimeter, circle area and sphere volume is the key value. In the analysis, π can be strictly defined as satisfaction crime? x？ The smallest positive real number x = 0.
In daily life, pi is usually expressed as 3. 14, which is used for approximate calculation. The fractional part 3. 14 1592654 is enough for general 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.
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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 value of pi with 39-bit precision is used to calculate the size of the universe, the error is less than the volume of an atom.
In the past, people calculated pi 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.
The transcendence of pi denies the possibility of turning a circle into a square, because all rulers can only draw algebraic numbers, and transcendental numbers are not algebraic numbers.