How do perpendicular lines interact?

Perpendicular lines are defined as two lines that intersect to form right angles. This means that when they cross each other, the angles formed at the intersection are exactly 90 degrees. This property is fundamental in geometry, as right angles are often used as a basis for many other concepts and calculations, such as in the definition of rectangles and squares or in the calculation of slope in coordinate geometry.

When two lines are perpendicular, they do not create acute angles (less than 90 degrees) or obtuse angles (greater than 90 degrees). Instead, their unique interaction results specifically in four right angles at the point of intersection. Understanding this characteristic is crucial in various applications, from architecture and engineering to coordinate geometry and trigonometry. Thus, the interaction of perpendicular lines is accurately described by the formation of right angles.