creator+of+pi

who was the person that created pi?

posted by **:smokey-dice1212**

he was the first to figure out the theoretical calculation of a value of pi. Archimedes worked out that Pi is a numerical constant that represents the ratio of a circle's circumference to its diameter on a flat plane surface and that the value is the same regardless of the size of the circle. Archimedes's results rested upon approximating the area of a circle based on the area of a regular polygon inscribed within the circle and the area of a regular polygon within which the circle was circumscribed.
 * Archimedes** (approximately 285---212 B.C.) was the most famous ancient Greek mathematician and inventor.



Posted by: **exclamation**

Archimedes.

Pi was first mentioned in Egypt. The first reference to Pi was in a Middle Kingdom papyrus scroll written sometime around 1650 BC. This scroll of significance was written by Ahmes. He states at the end of this scroll, which was titled, "The Entrance into Knowledge of All Existing Things," that the area of a circle is found using a rough sort of Pi. Ahmes had no idea how famous Pi would become and the mysteries regarding it. During the time of 200 BC, Archimedes of Syracuse discovered the value of Pi was about 3.14. The Greeks never used decimals, so they wrote it as a fraction back then. Archimedes discovered 3.14 by constructing a polygon with 96 sides and inscribing a circle in it. Although this was an historic discovery, it wasn’t the actual value of Pi. After this discovery, little progress and research was carried out dealing with Pi until the 17th century. Pi was given the title of the Ludolphian number, after a famous German mathematician named Ludolph van Ceulen.

Posted by: Salinakung

Pi is a Greek letter chosen to represent 3.141592... Archimedes, a famous Greek mathematician, was the first person to estimate pi rigorously. He found out that the magnitude can be bounded from below and above by drawing circles in regular polygons and calculating the outer and inner polygons' respective perimeters. He proved that 223/71 < π < 22/7 by using the equivalent of 96-sided polygons. Taking the mean of these values leaves you with 3.1419. In the centuries that followed, further developement took place in India and China. Until the second millennium, pi was known to less than 10 decimal numbers. The next big advance in pi came with the development of calculus.

pineapplepoptarts:

Archimedes, the Greek mathematician was the first person to test out the borders of pi.

The Babylons were the first to use it in detail, but Archimedes was the first one who discovered the method to reach 3.1415926535 (Pi) There are also many other people who discovered it, but he was the first. The value of π has been known in some form since antiquity. As early as the 19th century BC, Babylonian mathematicians were using π = 25⁄8, which is within 0.5% of the true value.
 * P o s t e d b y : D u m m y D e r r i c k**

The Egyptian scribe Ahmes wrote the oldest known text to give an approximate value for π, citing a Middle Kingdom papyrus, corresponding to a value of 256 divided by 81 or 3.160.

It is sometimes claimed that the Bible states that π = 3, based on a passage in 1 Kings 7:23 giving measurements for a round basin as having a 10 cubit diameter and a 30 cubit circumference. Rabbi Nehemiah explained this by the diameter being from outside to outside while the circumference was the inner brim, which gives an approximate value of ~3.14; but it may suffice that the measurements are given in round numbers. Also, the basin may not have been exactly circular, though the verse claims that "...it was completely round." (NKJ)

Principle of Archimedes' method to approximate π.Archimedes of Syracuse discovered, by considering the perimeters of 96-sided polygons inscribing a circle and inscribed by it, that π is between 223⁄71 and 22⁄7. The average of these two values is roughly 3.1419.

The Chinese mathematician Liu Hui computed π to 3.141014 (good to three decimal places) in AD 263 and suggested that 3.14 was a good approximation.

The Indian mathematician and astronomer Aryabhata in the 5th century gave the approximation π = 62832⁄20000 = 3.1416, correct when rounded off to four decimal places. He also acknowledged the fact that this was an approximation, which is quite advanced for the time period.

The Chinese mathematician and astronomer Zu Chongzhi computed π to be between 3.1415926 and 3.1415927 and gave two approximations of π, 355⁄113 and 22⁄7, in the 5th century.

The Indian mathematician and astronomer Madhava of Sangamagrama in the 14th century computed the value of π after transforming the power series expansion of π⁄4 into the form

and using the first 21 terms of this series to compute a rational approximation of π correct to 11 decimal places as 3.14159265359. By adding a remainder term to the original power series of π⁄4, he was able to compute π to an accuracy of 13 decimal places.

The Persian astronomer Ghyath ad-din Jamshid Kashani (1350–1439) correctly computed π to 9 digits in the base of 60, which is equivalent to 16 decimal digits as:

2π = 6.2831853071795865 By 1610, the German mathematician Ludolph van Ceulen had finished computing the first 35 decimal places of π. It is said that he was so proud of this accomplishment that he had them inscribed on his tombstone.

In 1789, the Slovene mathematician Jurij Vega improved John Machin's formula from 1706 and calculated the first 140 decimal places for π of which the first 126 were correct [1] and held the world record for 52 years until 1841, when William Rutherford calculated 208 decimal places of which the first 152 were correct.

The English amateur mathematician William Shanks, a man of independent means, spent over 20 years calculating π to 707 decimal places (accomplished in 1873). In 1944, D. F. Ferguson found that Shanks had made a mistake in the 528th decimal place, and that all succeeding digits were fallacious. By 1947, Ferguson had recalculated pi to 808 decimal places (with the aid of a mechanical desk calculator).

DERRICK-