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Really basic question. I was talking with my friend and we started to get onto discussing lines when I said in three dimensions a straight line can be curved. He thinks of a straight line as a line with no curve, whilst I see it as the shortest possible distance from A to B, which in 3 dimensions can be curved. I think that he is talking about 2-dimensional Euclidean geometry, and is not factoring in a 3rd dimension.
Is a straight line the shortest possible distance from A-B or a line with no curves?
Bit of an annoying question, I know.
Is a straight line the shortest possible distance from A-B or a line with no curves?
Bit of an annoying question, I know.