Why is a straight line always the shortest path between two points? 📐 This video explains the result using a variational approach, showing how minimizing distance leads naturally to a straight line ...

Intuitively, the shortest distance between two points is on the straight line joining the two points. But this is true only if one is travelling on a plane surface. In fact, it depends on the shape of ...

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A straight line may be the shortest distance between two points, but it isn’t necessarily the fastest or easiest path to follow. That’s particularly true when terrain is not level, and now American ...