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  ClosedTwoDimensionalFigure

 Sigma KEE - ClosedTwoDimensionalFigure

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封闭的二维图
这是任何有明确内部和外部分界的 TwoDimensionalFigure。
Relationships      
Parents 二维图 The class of GeometricFigures that have position and an extension along two dimensions, viz. plane figures like circles and polygons.
Children 圈子部门A slice of a Circle, i.e. any ClosedTwoDimensionalFigure which consists of two Radii and the arc of the Circle that they bound.
 椭圆The class of ClosedTwoDimensionalFigures that are produced by the intersection of a Cone with a ClosedTwoDimensionalFigure.
 多边形A ClosedTwoDimensionalFigure that is composed exclusively of straight lines, i.e. OneDimensionalFigures.


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