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Hence also is derived the old custom of describing sunwise a circle, with a burning brand, about houses, cattle, corn and corn-fields, to prevent their being burnt or in any way injured by evil spirits, or by witchcraft. The fiery circle was also made around women, as soon as possible after parturition, and also around newly-born babes.
This list of circle topics includes things related to the geometric shape, either abstractly, as in idealizations studied by geometers, or concretely in physical ...
P ' is the inverse of P with respect to the circle. To invert a number in arithmetic usually means to take its reciprocal. A closely related idea in geometry is that of "inverting" a point. In the plane, the inverse of a point P with respect to a reference circle (Ø) with center O and radius r is a point P ', lying on the ray from O through P ...
A vicious circle (or cycle) is a complex chain of events that reinforces itself through a feedback loop, with detrimental results. [1] It is a system with no tendency toward equilibrium ( social , economic , ecological , etc.), at least in the short run.
A Reuleaux triangle is a curved triangle with constant width, the simplest and best known curve of constant width other than the circle. [1] It is formed from the intersection of three circular disks, each having its center on the boundary of the other two.
A circle bounds a region of the plane called a disc. The circle has been known since before the beginning of recorded history. Natural circles are common, such as the full moon or a slice of round fruit. The circle is the basis for the wheel, which, with related inventions such as gears, makes much of modern
For more information, see the article about circle. Articles relating to circles , a shape consisting of all points in a plane that are at a given distance from a given point, the centre . Equivalently, it is the curve traced out by a point that moves in a plane so that its distance from a given point is constant .
In linguistics, converses or relational antonyms are pairs of words that refer to a relationship from opposite points of view, such as parent/child or borrow/lend. [ 1 ] [ 2 ] The relationship between such words is called a converse relation . [ 2 ]