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Term 1: Term 2:

(subclass TwoDimensionalAngle OpenTwoDimensionalFigure) Merge.kif 17805-17805
(subclass ObliqueAngle TwoDimensionalAngle) Mid-level-ontology.kif 4844-4844
(subclass RightAngle TwoDimensionalAngle) Mid-level-ontology.kif 4855-4855
(subclass AcuteAngle TwoDimensionalAngle) Mid-level-ontology.kif 4863-4863


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