Because then the point of intersection would have to be two different altitudes like if a 290 feet and 300 feet countor lines cross it would have to be both 290 and 300 feet altitude at the same time which is impossible
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Because contour lines make places of equal height.
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.