OK, let me preface this by stating I never took math beyond 11th grade Algebra, which I barely passed (although I did get straight A's in Geometry the year before).
As I recall, a line theoretically extends infinitely in 2 directions.
Let's say we have a start line at the end of a street, and one block over, the finish line, on the exact line extended as the start.
Is the distance between the start and finish Zero, since they occupy the same line in space, or is it the width of the block? And if that latter, is it from the two closest points on the line, the farthest, or the middle?
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