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

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

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Surveying
The First Point of Aeries

Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
All listed here
Is usually denoted by the Greek letter ?
Is the point in the celestial sphere where zero meridian crosses the celestial equator

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