Surveying
The necessary geometrical condition for triangulation adjustment is:

The sum of the three angles of a plane triangle should be 180°
The sum of the eight angles of a braced quadrilateral should be 360°
The sum of the angles around a station should be 360°
All listed here

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Surveying
The length of a chain is measured from

outside of one handle to inside of other handle
outside of one handle to outside of other handle
centre of one handle to centre of other handle
inside of one handle to inside of other handle

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Surveying
The prismatic compass and surveyor’s compass

both give QB of a line
both give QB of a line and WCB of a line
both give WCB of a line
give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively

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