Surveying
Pick up the incorrect statement from the following. In a spherical triangle

Every angle is less than two right angles
Sum of any two sides is greater than the third
Sum of the three angles is equal to two right angles
Sum of the three angles less than six right angles and greater than two right angles

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Surveying
For mapping any country

Geodetic triangulation of greatest possible sides and accuracy is carried out
Secondary triangles are further broken into third and fourth order triangles, the points of which are used for detail surveys
Primary triangles are broken down into secondary triangles of somewhat lesser accuracy
All listed here

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Surveying
In the prismatic compass

the magnetic needle moves with the box
the line of the sight does not move with the box
the magnetic needle and graduated circle do not move with the box
the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction

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