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Sigma KEE - RightAngle

RightAngle(right angle)

appearance as argument number 1

(documentation RightAngle EnglishLanguage "Any TwoDimensionalAngle that has the angularMeasure of 90 AngularDegrees.")	Mid-level-ontology.kif 4583-4584
(externalImage RightAngle "http://upload.wikimedia.org/wikipedia/commons/ 6/ 6c/ Right_angle.svg")	pictureList.kif 1959-1959
(instance RightAngle PositionalAttribute)	Cars.kif 2249-2249	Right angle is an instance of positional attribute
(subclass RightAngle TwoDimensionalAngle)	Mid-level-ontology.kif 4582-4582	Right angle is a subclass of two dimensional angle

appearance as argument number 2

(partition TwoDimensionalAngle RightAngle ObliqueAngle AcuteAngle)	Mid-level-ontology.kif 4593-4593	Two dimensional angle is exhaustively partitioned into right angle, oblique angle, and acute angle
(termFormat ChineseLanguage RightAngle "直角")	domainEnglishFormat.kif 49995-49995
(termFormat ChineseTraditionalLanguage RightAngle "直角")	domainEnglishFormat.kif 49994-49994
(termFormat EnglishLanguage RightAngle "right angle")	domainEnglishFormat.kif 49993-49993

antecedent

(=>
(instance ?A RightAngle)
(angularMeasure ?A 90.0))

Mid-level-ontology.kif 4586-4588

If a two dimensional angle is an instance of right angle,
then 90.0 is an angular measure of the two dimensional angle

consequent

(=> (instance ?D Differential) (exists (?G1 ?G2) (and (instance ?G1 Gear) (instance ?G2 Gear) (part ?G1 ?D) (part ?G2 ?D) (orientation ?G1 ?G2 RightAngle))))	Cars.kif 2257-2265	If an object is an instance of differential, then there exist another object and a third object such that the other object is an instance of gear and the third object is an instance of gear and the other object is a part of the object and the third object is a part of the object and the other object is right angle to the third object
(=> (instance ?RECTANGLE Rectangle) (=> (angleOfFigure ?ANGLE ?RECTANGLE) (instance ?ANGLE RightAngle)))	Mid-level-ontology.kif 4650-4654	If a geometric figure is an instance of rectangle, then if a two dimensional angle is the angle found in the geometric figure, then the two dimensional angle is an instance of right angle
(=> (instance ?T RightTriangle) (exists (?A) (and (instance ?A RightAngle) (angleOfFigure ?A ?T))))	Mid-level-ontology.kif 4629-4634	If a geometric figure is an instance of right triangle, then there exists a two dimensional angle such that the two dimensional angle is an instance of right angle and the two dimensional angle is the angle found in the geometric figure

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