Surveying
For adjusting a quadrilateral whose both the diagonals are observed, the equations of conditions involved, are

One angle equation and three side equations
None of these
Two angle equations and two side equations
Three angle equations and one side equation

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Surveying
The First Point of Aeries

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

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