Perpendicularity is the relationship between two lines or planes that intersect at a right angle (90 degrees). In other words, they are perpendicular if they are at right angles to each other.
Checking perpendicularity is important in various fields, including carpentry, engineering, and manufacturing. It ensures accuracy, precision, and proper functioning of structures and objects. Historically, tools like the carpenter’s square and the plumb bob have been used to check perpendicularity.
