You need to design a wall parallel to an existing wall AB corresponding to a neighboring building, starting from a point P. You have a topographic instrument that only measures horizontal angles. You must design the wall as soon as possible, so you define a point X, such that the alignment PX is approximately parallel to the existing wall. The surveying instrument is placed over points P and X and the angles shown in the following log are measured.

Station // Point // Horizontal Angle

It is required to calculate. 3.1.- The Angle that the alignment PX forms with the sought alignment (the parallel to the existing wall), consider the Value PX=20 m.

above is translated

Estacin Punto X A B Angulo Horizontal 110.0160 54.9615 76.8900 399.9980 48.1255 88.2583