# What is the use of Pi?

### What is the use of Pi?

the number Pi is used since antiquity by mathematicians, first to solve geometric problems, then in the integral calculus and finally in the computer age to calculate always more decimals of Pi.

### When will the pi increase in value?

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### Why was pi invented?

The notation π corresponds to the 16th letter of the Greek alphabet which only appeared in 1647. Inspired by Archimedes who designated the length of the circumference by the word “περιμετροε” (perimeter), it is due to the English William Oughtred (15) who used it to name the perimeter of a circle.

### Is Pi an irrational number?

Pi is an irrational number (vs’is to say that it is written with a number infinity of decimals without logical sequence).

### Is the number Pi a mathematical object?

No doubt because of the simplicity of its definition, the number pi and particularly its decimal notation are anchored in popular culture to a greater degree than any other mathematical object.

### How did mathematicians approach the value of the number pi?

Throughout history, mathematicians around the world (from China to Europe via the Middle East) have sought to approach its value as accurately as possible, by calculating ever more decimals. It was Archimedes of Syracuse (2 BC) who was the first to use an algorithm to calculate decimals of the number pi.

### How to calculate the value of Pi?

As with all irrational numbers, we can only approximate the exact value of pi, but there are mnemonic devices to remember the first decimals. One method consists for example in counting the number of letters of each word in the following sentence: How I like to teach this useful number to the wise!.

### What is the number pi?

Or in any case, it must evoke some vague memories (good or bad) in you! The number Pi is also defined as the ratio of the area of ​​a disk squared to its radius.