Principle of Tacheometry

 Principle of Tacheometry

The principle of the tachometer is based on the property of the isosceles triangle.

Statement:-

• In the isosceles triangle the ratio of the perpendiculars from the vertex on their bases.



In the figure, let two rays OA and OB be equally inclined to central ray OC. Let A₂B₂, A₁B₁ and AB be the staff intercepts. Evidently,


 

= constant k = (1/2) cot (β/2)

This constant k entirely depends upon the magnitude of the angle β

 

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