Assignment $6\mathrm{.}1$

Problem $1$

From the two inaccessible but intervisible points A

and $B,$ the angles to two triangulation stations $C$

and $D$ were observed as follows: Line $CD$ has a

distance of $500$ m long. Compute the distance of the

line AB$.$

Angle CAB $=79{30}^{\text{'}}$

Angle DAB $=28{30}^{\text{'}}$

Angle $DBC=31{30}^{\text{'}}$

Angle DBA $=84{30}^{\text{'}}$