Why is the 'straight line' path across continent so curved?

المشرف العام

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This is the result of mapping the straight line path from a point in US to Poland using Distance Measurement Tool.

Also, planes from Asia to US would travel almost over North Pole.



Why is the path so curved? I agree that this is a flat representation of a sphere, so I do expect some arc, but I don't think earth has this much curvature.

What am I missing here?



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