Surveying
The shortest distance between two places measured along the surface of the earth, is

Length of the equator between their longitudes
Length of the parallel between their longitudes
Length of the arc of the great circle passing through them
None of these

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Surveying
Circumpolar stars

Remain always above the horizon
Are seldom seen near the pole star
Rotate round the North Pole
Rotate round the celestial pole

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