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Circle

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Circle[{x, y}, r]
is a two-dimensional graphics primitive that represents a circle of radius r centered at the point x, y.
Circle[{x, y}]
gives a circle of radius 1.
Circle[{x, y}, r, {1, 2}]
gives a circular arc.
Circle[{x, y}, {rx, ry}]
gives an ellipse with semi-axes of lengths rx and ry, oriented parallel to the coordinate axes.
  • Angles are measured in radians counterclockwise from the positive x direction.
  • Circle[{x, y}, {rx, ry}, {1, 2}] yields a segment of an ellipse obtained by transforming a circular arc with the specified starting and ending angles.  »
  • Scaled[{drx, dry}] or Scaled[{drx, dry}, {rx, ry}] can be used in the radius specification. The dri are in scaled coordinates, and the ri are in ordinary coordinates.
  • Offset[{ax, ay}] can be used to specify radii in printer's points.  »
  • The thickness of the circle can be specified using the Thickness primitive.  »
  • Individual coordinates, lists of coordinates, and parameters in circles can be Dynamic objects.
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