EntityQ3590896· pop 9· linked from 26 articlesequipollenceSign in to saveproperty of parallel segments that have the same length and the same directionConnectionsBertrand RussellEntityEuclidean vectorEntityparallelogramEntityEuclidean geometryEntityvector spaceEntityWilliam Rowan HamiltonEntityUniversity of MichiganEntityline segmentEntityquaternionEntityEuclidean spaceEntityGoogle BooksEntitygreat circleEntityparallelismEntityequivalence relationEntityWilliam Kingdon CliffordEntityrelative directionEntityE. C. George SudarshanEntitycollinearityEntityaffine spaceEntitycircular arcEntityCategoriesBinary relationsEquivalence (mathematics)History of mathematicsVectors (mathematics and physics)