A and B are two points located on each bank of a river

A and B are two points located on each bank of a river and near the abutments of a proposed bridge, to determine its distance a base line CD 180.0 m long is established on the opposite bank of the river and the transit is set-up at stations C and D. The azimuth were taken as follows (40 pts)

Line

C-D

21000

C-A

26000

C-B

29000

D-A

30100

D-B

31500

Compute the length of AB.

Requirements:

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