Surveying
Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?

Measuring angle at one station and distance from other
Measuring angle and distance from one transit station
Measuring distance from two points on traverse line
Measuring angles to the point from at least two stations

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Surveying
For a line AB

the forebearing of AB and back bearing of AB differ by 180°
both (A) and (B) are correct
none is correct
the forebearing of AB and back bearing of BA differ by 180°

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