TreeView Knowledge Base Browser - TwoDimensionalFigure

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Sigma KEE - TwoDimensionalFigure

二维图

这是有定位并在两个维度上有延伸空间的 GeometricFigure 类别，即是如圆圈和多边形的平面图。

Relationships
Parents	几何图	The class of all geometric figures, i.e. the class of all abstract, spatial representations. The instances of this class are GeometricPoints, TwoDimensionalFigures or ThreeDimensionalFigures.
Children	封闭的二维图	Any TwoDimensionalFigure which has a well defined interior and exterior.
	开放二维图	The class of TwoDimensionalFigures that are not ClosedTwoDimensionalFigures.