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Circle - Wikipedia


A circle is a simple closed shape in Euclidean geometry. It is the set of all points in a plane that are at a given distance from a given point, the centre; equivalently  ...

Who invented the circle? | Reference.com


Since circular creations appear throughout nature, no man can be credited with the invention of the circle. From the cross-section of a plant stem to the moon and  ...


jwilson.coe.uga.edu/emt668/emat6680.f99/Kim/emat6690/instructional unit/circle/Circle/Circle.htm

Circle. History. The study of the circle goes back beyond the recorded history. The invention of the wheel is a fundamental discovery of properties of a circle.

History of Circles | Circles Only's Blog


Posts about History of Circles written by circlesonly. ... It is a mental construct, a symbolic representation that was invented much the same as language and the ...

Who is the person who invented the idea of Circles? - Quora


I think that Google+ Circles is an awesome idea ... The concept can be traced back to Paul Adams and his well publicized slideshow "The Real Life Social Network" ...

Archimedes on the Circumference and Area of a Circle - Feature ...


Archimedes' essay on the `Measurement of a circle' is often referred to but, I suspect, .... Eudoxus is elsewhere said to be the one who invented the extremely  ...

Circle | Uncyclopedia | Fandom powered by Wikia


The first circle was invented by God on the ninth day of creation (after the First Sabbath and circumcision of the world). It is the most pointless shape that exists,  ...

Circle - MacTutor History of Mathematics


Circle. Cartesian equation: x<sup>2</sup> + y<sup>2</sup> = a<sup>2</sup> or parametrically: x = a cos(t), y = a sin(t) Polar equation: r = a. Click below to see one of the Associated curves.

History of Circle Area Formula - Math Forum - Ask Dr. Math


Do we know who figured out that pi*r^2 gives the area of a circle?

Why is a Circle 360 Degrees? - Math Forum - Ask Dr. Math


What is the origin/basis of the degree measurement? Why is a circle divided into 360 degrees rather than some other number?

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William Jones and his Circle: The Man who invented Pi | History Today


The history of the constant ratio of the circumference to the diameter of any circle is as old as man's desire to measure; whereas the symbol for this ratio known ...

USATODAY.com - The 360-degree circle is 4400 years old


Jun 21, 2002 ... The 360-degree circle is 4400 years old Q: Why does a circle have 360 degrees, why ... Ancient Babylonians may have invented the sundial.

Who determined that a circle should be divided into 360 degrees ...


Feb 5, 2002 ... _ The same people who invented the wheel about 6000 years ago: the ... the ancient Egyptians, who used it to divide a circle into 360 degrees, ...