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Sigma KEE - TwoDimensionalFigure

two dimensional figure

The class of GeometricFigures that have position and an extension along two dimensions, viz. plane figures like circles and polygons.

Relationships
Parents	geometric figure	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	closed two dimensional figure	Any TwoDimensionalFigure which has a well defined interior and exterior.
	open two dimensional figure	The class of TwoDimensionalFigures that are not ClosedTwoDimensionalFigures.