If the question means, "What do you call the point where two lines cross?" The answer would be "intersection". Otherwise, I would call them 2 intersecting lines.
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Two lines cross at a point.
Two lines cross or intersect at a point.
The location two lines cross or intersect is called a vertex.
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.
Intersection or perpendicular lines.