In geometry, two geometric objects are perpendicular if they intersect at right angles, i.e. at an angle of 90 degrees or π/2 radians. The condition of perpendicularity may be represented graphically using the perpendicular symbol, . Perpendicular intersections can happen between two lines (or two line segments), between a line and a plane, and between two planes. Perpendicular is also used as a noun: a perpendicular is a line which is perpendicular to a given line or plane ... Last updated at July 23, 2025 ... Learn what are perpendicular lines , how to construct them, and their properties and examples. Find out the difference between perpendicular and parallel lines and real-life examples of perpendicularity. Learn about parallel and perpendicular lines . Get their definitions, properties, and examples in everyday life.
