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Discovery of Pi

Euclidean geometry, attributed by Greek mathematician Euclid (born 325 BC) was the first recorded system used to show Pi as a mathematical constant. Pi is approximately equal to 3.14159, which is also referred to the constant circumference. William Jones used the name Pi for the Greek letter meaning the perimeter in 1706, and at a later time referred more often by Leonhard Euler.

Although in 5th century Aryabhatt calculate the circumference of the earth and that time he used 22/7 as constant in the calculation. But that value was not assigned to any character, as Euclid did.

An Overview of Pi History
The history of the pi is usually divided into three eras. The ancient period was the time it was studied in geometric terms. The classic era took place in 17th Europe following the invention of calculus. The current one is the digital period, where computers are used to analyze and compute the data.
The Susa math tablets (c 2000 BC) can shed light on some facts about pi. These were set down in cuneiform and discovered in Shush, Iran. There it is said that the ratio of the circumference of a circle compared to a hexagonal perimeter is 1:0.96.
This is taken by some experts as a pi=3.125. Most of the ancient civilizations located an area by multiplying a square of the circumference by 1/12.
The Ahmes Papyrus
While no Egyptian texts state their use of pi, some math experts suggest otherwise. The Ahmes papyrus (or Rind papyrus) seem to indicate some awareness on their part. It was composed around 1820 BC.
It is mostly concerned with problems about locating the circle's area from the diameter. When studying the facts about pi, it is about multiplying the diameter by 8/9. This is the p/4. From the text in the papyrus, the value is at least p= (256/81) =3.1605.
The Moscow Papyrus
There is another Egyptian papyrus called the Moscow papyrus (where it is kept). It deals with mathematical problems. One problem is about a basket area 4 times the diameter square times 8/9 square. Some experts have determined that it is an open ended semi-cylinder. In terms of pi, the error is only a small value. The answer is still correct even if the shape is hemispherical.
The Greeks
The Greek mathematician Archimedes (250 BC) knew some facts about pi. He stated that two ratios (area to radius squared and circumference to diameter) were equal. Archimedes was not the first one to recognize it, but he was the first to show proof of it. His statement that it is between 223/71 and 22/7 are the first pi ranges used. The 22/7 is now known as the Archimedean value.
The Use of the Letters
Prior to the 17th century, the value was never expressed in symbols. The use of the letter was first used in 1647. English math teacher William Oughtred set it down as p.d. William Jones in 1706 reduced it to just p. The Swiss mathematician Leonard Euler was the one who made usage of p popular. Numerous symbols were used to express 3.14 but as time went on, only the p remained.
The facts about pi's origin will only be known through further research. The ancient Egyptians seemed to be the first but there are still a lot of unanswered questions regarding its roots.
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How was pi discovered?

The early history of N (pi) from textual sources roughly parallels the development of mathematics as a whole. Early evidence points toward use of an approximation for the len

Who discover value of pi?

    The Egyptians and the Babylonians are the first cultures that discovered Pi about 4,000 years ago.

Why was pi discovered?

So Marie Callendar's would have something to sell, NO SERIOUSLY! The Egyptians used an approximation of Pi in the 20th century B.C. and probably used it for construction and b

Who discovered pi first?

It is not known exactly who first discovered Pi. It has been used  for over 4,000 years and dates back to the times of ancient  Egyptians.

How do you discover pi?

First draw a circle using a compass. Now, use a piece of string to help measure the circumference of the circle. Now measure the diameter of the circle. To discover Pi divide

Who discovered pi in maths?

Historically, Ancient Egyptians are the first who introduced a reasonably accurate value for the ratio of the circle area and its square radius. They used an approximate value
In Science

Who discovered pi and screamed eureka?

Archimedes was the first to discover it accurately but pi was around in the time of early egyptians and mesopotamians...so pi has been around for a long time Archimedes did, o