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The ancient Egyptians and Babylonians knew that there was a constant ratio between the circumference of a circle and its diameter. The Egyptians used the approximate value 3 and 1/8 (=3.125) around 2000 BC. This is always a constant which is evident from the equation:

2 x Pi x r = circumference.

The ancient Greek mathematician Archimedes (287-212 BC) proved that pi is between 3 and 1/7 and 3 and 10/71, in around 240 BC. In decimal notation this puts pi between 3.1408 and 3.1429, which is good enough for most practical purposes. In fact 3 and 1/7, or 22/7, is good enough for most purposes. Note that pi is not exactly equal to any ratio of whole numbers.

Note that pi is not exactly equal to 22/7, or to any ratio of whole numbers. See the answer below for quite a few digits. It is a constant irrational value. It's most accurate value is approximately

3.14159 26535 89793 23846 26433 83279 ...

(Note the three dots at the end means pi goes on for ever without repeating.)

The ratio of the circumference to the diameter of a circle is the same for all circles. This fact was known to ancient Egyptian, Babylonian, Indian and Greek mathematicians.. The earliest known approximations of Pi are from around 1900 BC; they are 25/8 (Babylonia) and 256/81 (Egypt), both within 1% of the true value.

The actual symbol, the Greek letter, was not used until 1706, but the concept is 4000 years old.

The first person that used pi would be the Greeks and the Archimedes from Syracuse. The mathematician figured out that pi = 3.14 or 3 1/7.

Pi is the ratio between the circumference and the diameter of a circle.

In the past, Pi has been calculated in a number of ways. One of the first mentions of pi can be found in The Bible. The first major breakthrough in the calculation of pi (before it was just approximations such a route 10) was by Archimedes. He calculated the circumference of a circle with radius 0.5 but circumscribing polygons around a circle, and increasing the number of sides on the polygon. He got to 96 sides.

Later, Leibniz learnt to calculate Pi (around the 16th century) through approximating Arctan1, which is Pi (in radians). There is an infinite series for Pi which was found by Taylor a few years earlier. The infinite series for pi was:

1 - 1/3 + 1/5 - 1/7 + 1/9... = Pi/4

This was followed by a number of other breakthroughs which lead to the computer age of calculating pi. With that, the calculation of Pi to several trillion decimal places was possible.

In modern times, pi has almost been made less accurate by government legislation. Many bills have been proposed in the United States over the years to make pi exactly equal to 3. The reasoning has ranged from "biblical accuracy" (quoting a ratio of three cubits to one cubit) to raising test scores. Many rumors about certain politicians trying to enact this legislation prove not to be true, but a few attempts have been made. Most of these attempts are quickly squelched early in the legislative process, but one 1897 attempt in Indiana made it all the way to the state senate before being killed.

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Q: What is the history of mathematical pi?
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Related questions

What is the exact history of mathematical pi?

The circumference of any circle when divided by its diameter has the exact value of pi

Who wrote the book the joy of pi?

The book "The Joy of Pi" was written by David Blatner. It explores the history and significance of the mathematical constant pi in a fun and accessible way.

What fraction is equal to the mathematical term pi?

The mathematical term of pi is approximated equal to 22/7. :)

What are the famous mathematical problems featuring pi?

The famous mathematical problems featuring pi include finding the area and the circumference of a circle. The value for pi is 3.14.

What is define of pi and write a brief history of pi?

pi is a mathematical formula, or 3.14159265389793238462683. it relates to the diameter and circumference of a circle. i don't know the history but im sure its somwhere!answ2. There is currently a proposal to name 2 Pi as Tau, as this aids in many calculations. Watch this space. The ratio of the perimeter to the height of Khufu's Pyramid is 2 Pi.

Who in 1706 first gave pi its current mathematical definition?

Pi as a mathematical symbol was introduced by William Jones in 1706

What does the mathematical symbol of Pi equal?

Pi is approximately equal to 3.141592652389793238462.

What is the mathematical sign for pi?

= 3.14

Why is pi a mathematical concept?

It is a decimal

What mathematical principle is equal to 3.14?

That's not a "mathematical principle", it is an approximation of the number pi.That's not a "mathematical principle", it is an approximation of the number pi.That's not a "mathematical principle", it is an approximation of the number pi.That's not a "mathematical principle", it is an approximation of the number pi.

Write a short note on the history of pi?

The history of pi dates back to ancient civilizations, such as the Babylonians and Egyptians, who approximated the value of pi. The first accurate calculation of pi was made by the Greek mathematician Archimedes in the 3rd century BC. The symbol for pi was introduced by the Welsh mathematician William Jones in the 18th century, and it has since become one of the most important mathematical constants in mathematics.

What are the famous numbers of the mathematical Pi?

Pi is a single number so there cannot be famous numbersof pi.