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Term 1: Term 2:

(subclass OpenTwoDimensionalFigure TwoDimensionalFigure) Merge.kif 17880-17880 OpenTwoDimensionalFigure e' uma sub-classe de TwoDimensionalFigure
(subclass TwoDimensionalAngle OpenTwoDimensionalFigure) Merge.kif 17884-17884 TwoDimensionalAngle e' uma sub-classe de OpenTwoDimensionalFigure


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