Perpendicular is also used as a noun: a perpendicular is a line which is perpendicular to a given line or plane. Perpendicularity is one particular instance of the more general mathematical concept of orthogonality; perpendicularity is the orthogonality of classical geometric objects. Perpendicular Lines are a pair of lines that always intersect each other at right angles. Learn the properties, formula and examples of Perpendicular Lines in this article. PERPENDICULAR definition: 1. at an angle of 90° to a horizontal line or surface: 2. at an angle of 90° to another line or…. Learn more. What is a perpendicular line? Find out about right angles, perpendicular lines, and parallel lines in this Teaching Wiki. Includes learning resources.
