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

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

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Surveying
A telescope is said to be inverted if its

vertical circle is to its left and the bubble of the telescope is up
vertical circle is to its right and the bubble of the telescope is up
vertical circle is to its right and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is down

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