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- 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.
-