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

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

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Surveying
Theodolite is an instrument used for

measurement of vertical angles only
tightening the capstan-headed nuts of level tube
measurement of both horizontal and vertical angles
measurement of horizontal angles only

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