Just read somewhere that the shortest path between two locations is an arc and not a straight line! eli5 how an arc is the shortest path for planes.
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It’s still a straight line, but you’re thinking about a geodesic.
In curved space, the straight line actually forms an arc when you view it on a 2D map
https://gisgeography.com/great-circle-geodesic-line-shortest-flight-path/
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