+Perpendicular [lines](/wiki/line) are two lines that meet or intersect, forming a perfect [right angle](/wiki/right_angle) (90 degrees) at their point of convergence. This fundamental geometric relationship is a cornerstone in construction and design, defining square corners and stable forms.
+## See also
+- [Parallel Lines](/wiki/parallel_lines)
+- [Geometry](/wiki/geometry)
+- [Angle](/wiki/angle)
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