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> Figure 4-23. Case IV
Figure 4-22. Solving for unknown angles (tangent law)
Case IV - Three Sides
Surveying I
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Example
: In
Figure
4-23,
side
a of
the
triangle
equals
197.70,
side
b equals
206.15,
and
side
c equals
184.42.
Find
the
value
of
the
three
angles.
Figure
4-23.
Case
IV
Solution
:
Determine
the
value
of s.
Now
solve
for
the
angles.
4-31
EN0591