(subclass TwoDimensionalAngle OpenTwoDimensionalFigure) | Merge.kif 17805-17805 | Two dimensional angle is a subclass of open two dimensional figure |
(subclass ObliqueAngle TwoDimensionalAngle) | Mid-level-ontology.kif 4844-4844 | Oblique angle is a subclass of two dimensional angle |
(subclass RightAngle TwoDimensionalAngle) | Mid-level-ontology.kif 4855-4855 | Right angle is a subclass of two dimensional angle |
(subclass AcuteAngle TwoDimensionalAngle) | Mid-level-ontology.kif 4863-4863 | Acute angle is a subclass of two dimensional angle |