Surveying
For a line AB

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

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Surveying
Bowditch rule is applied to

determine the effect of local attraction
an open traverse for graphical adjustment
None of these
a closed traverse for adjustment of closing error

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