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Term 1: Term 2:

(subclass OpenTwoDimensionalFigure TwoDimensionalFigure) Merge.kif 17801-17801 Open two dimensional figure is a subclass of two dimensional figure
(subclass TwoDimensionalAngle OpenTwoDimensionalFigure) Merge.kif 17805-17805 Two dimensional angle is a subclass of open two dimensional figure


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