I believe Archimedes was the first to realize the relationship between the circumference and diameter of a circle. Not sure if he named it though. I think Egyptians were the first to make circular things and use circle in architecture.
Search online for Archimedes
2007-01-24 01:02:01
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answer #1
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answered by NIS 2
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**Who made pie (Geometry) Why when where? **
Pi was known by the Egyptians, who calculated it to be approximately (4/3)^4 which equals 3.1604. The earliest known reference to pi occurs in a Middle Kingdom papyrus scroll, written around 1650 BC by a scribe named Ahmes. He began the scroll with the words: "The Entrance Into the Knowledge of All Existing Things" and remarked in passing that he composed the scroll "in likeness to writings made of old." Towards the end of the scroll, which is composed of various mathematical problems and their solutions, the area of a circle is found using a rough sort of pi.
Please check the information at the URLs there is more .
Have a pleasant day.
2007-01-24 08:57:53
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answer #2
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answered by zurioluchi 7
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The real question you're asking is (I assume, slightly): "Who discovered that the ratio of the circumference to the diameter of a circle is always the same, no matter the size or position of the circle?" Pi is just a number. If you would have told someone in ancient times to walk 3 hands (or whatever they're measurements were), and then keep walking in small steps and then you told them to stop when they had reached pi cubits, they would believe you if you told them that they walked a distance (their word equivalent to our "real number"), and that you can call this distance "Pi." However, they probably would have questioned the significance.
Thus, my adjusted version of the question is much better, since it gets to the heart of answering when people started using the number pi.
Unfortunately, historians don't actually know the answer to this question. They have early dates when pi was known (the Rhind Papyrus of Egypt, from 1650 B.C. uses the approximation pi=4*(8/9)^2).
However, Archimedes gave the first known estimate of Pi based purely on theory (using an ideal circle), and not on empirical measurements.
2007-01-24 09:00:51
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answer #3
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answered by Charles Fahringer 3
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The value of Ï has been known in some form since antiquity. As early as the 19th century BC, Babylonian mathematicians were using Ï = 25⁄8, which is within 0.5% of the true value.
The Egyptian scribe Ahmes wrote the oldest known text to give an approximate value for Ï, citing a Middle Kingdom papyrus, corresponding to a value of 256 divided by 81 or 3.160.
http://en.wikipedia.org/wiki/Pi
2007-01-24 08:55:44
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answer #4
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answered by Anonymous
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The mathematical constant Ï is an irrational real number, approximately equal to 3.141592653..., which is the ratio of a circle's circumference to its diameter in Euclidean geometry, and has many uses in mathematics, physics, and engineering. It is also known as Archimedes' constant (not to be confused with an Archimedes number) and as Ludolph's number.
2007-01-24 08:57:10
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answer #5
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answered by sanjaykchawla 5
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It's "Pi". And it was Pythagoras. That's as much homework as I'm doing for you today though.
2007-01-24 08:47:48
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answer #6
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answered by RIffRaffMama 4
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