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Sigma KEE - TwoDimensionalAngle
KB Term: 

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two dimensional angle
Any two OneDimensionalFigures (i.e. straight lines) meeting at a single GeometricPoint.
Relationships      
Parents open two dimensional figure The class of TwoDimensionalFigures that are not ClosedTwoDimensionalFigures.
Children acute angleAny TwoDimensionalAngle that has an angularMeasure that is less than 90 AngularDegrees.
 oblique angleAny TwoDimensionalAngle that has an angularMeasure that is greater than 90 AngularDegrees.
 right angleAny TwoDimensionalAngle that has the angularMeasure of 90 AngularDegrees.


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