Perpendicular lines.
Perpendicular
intersecting lines
parallel lines
perpendicular.
parallel lines
Parallel lines, by definition, never meet or intersect, as they are always equidistant from each other. If lines do meet, they are not parallel. If two lines that are not parallel intersect at a single point, they are referred to as intersecting lines.
Two lines that intersect and form 90-degree angles (right angles) are "perpendicular" to each other. You would call them "perpendicular lines."
Parallel lines.
Perpendicular lines.
skewed lines
Skew lines.
Vertex