Parallel & perpendicular lines
plane-figures--imp-parallel-and-perpendicular--identifying-parallel-and-perpendicular-lines
Plane figures
Parallel and perpendicular
Parallel lines are lines that never intersect, and they form the same angle when they cross another line. Perpendicular lines intersect at a 90-degree angle, forming a square corner. We can identify these lines using angles and symbols in diagrams.