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curve
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A parabola is a curve produced when a cone is cut by a plane. It is one of the family of curves called conic sections that also includes the circle, ellipse, and hyperbola. These curves are produced when the plane cuts the cone at different angles and positions.

In geometry, the locus of a point moving according to specified conditions. The circle is the locus of all points equidistant from a given point (the centre). Other common geometrical curves are the ellipse, parabola, and hyperbola, which are also produced when a cone is cut by a plane at different angles.

Many curves have been invented for the solution of special problems in geometry and mechanics – for example, the cissoid (the inverse of a parabola) and the cycloid.



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? Mentioned in ? References in periodicals archive
 
The transition from central to peripheral vision may explain why curve balls appear to change direction.
Why batters find it hard to hit a curve ball by Asian News International
Obagi Skin Care knows that although skin is a wonderful thing to have - it does have a tendency to throw us some curve balls occasionally An obvious benefit of skin is that it protects our bodies'' internal organs from harmful elements like dirt, insects, bites, toxic chemicals, nasty weather, and the like, and it certainly is more attractive than what''s underneath
Obagi Acne Treatment by Stuart Hawley / Health care industry community
with bookmakers that use exchanges Hills are, in fact, knowingly throwing curve balls that end up scoring own goals by increasing the liquidity of the exchange markets and thus the longevity of same.
Letter: Hills have choice over exchanges by The Racing Post (London, England)
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