Perpendicular means two lines intersect or cross at a 90 degree angle
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If they intersect at right angles which is 90 degrees then they are perpendicular lines.
"Perpendicular" means at an angle of 90° to a given line, plane, or surface.
It is a straight line that intercepts another straight line at 90 degrees
They could be: parallel lines, perpendicular lines or intersecting lines
They are lines that cut through parallel lines