In mathematics, orthogonality is the generalization of the geometric notion of perpendicularity. Whereas perpendicular is typically followed by to when relating two lines to one another (e.g., "line A is perpendicular to line B"), orthogonal is commonly used without to (e.g., "orthogonal lines A and B").
In mathematics, orthogonality is the generalization of the geometric notion of perpendicularity. Whereas perpendicular is typically followed by to when relating two l.ines to one another (e.g. "line A is perpendicular to l,ine B"), orthogonal is commonly used without to (eg., "orthogonal lines A and B").