A single line cannot be perpendicular or parallel. These are attributes of two (or more) lines.
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Latitude lines are imaginary lines that are parallel to the equator to fix a position on earth (along with longitude lines which are imaginary lines perpendicular to the equator)
It has parallel sides, but not perpendicular.
perpendicular cross parallel do not
Parallel
No they are perpendicular if the intersect at a right angle. + is perpendicular, = is parallel