Both!! gezz that's easy :P
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Perpendicular is when two lines cross... Parallel is when two lines never meet.... _____________ _____________ = PARALLEL LINES If they cross they are perpendicular, if they don't, they are parallel.
A rhombus has parallel lines but no perpendicular lines.
Right triangles have a set of perpendicular lines and no parallel lines.
Parallel. Latitude and longitude are perpendicular.
Parallel lines are never perpendicular. Perpendicular lines are co-planar and cross at right angles.