Surveying
The angle between the prolongation of the preceding line and the forward line of a traverse is called

deflection angle
None of these
included angle
direct angle

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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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