Question 525332
<pre>

{{{drawing(400,92800/623,-10,613,-10,222,

triangle(0,0,602.862282,0,246.1946451,212.1631371),
locate(-10,10,A),locate(610,10,B), locate(220,222,C),
locate(220,180,"108.5°"),locate(70,130,325m), locate(420,130,415m)

 )}}} 

c² = a² + b² - 2ab·cos(C)
c² = 415² + 325² - 2(415)(325)cos(108.5°)
c² = 363442.9311
 c = 602.862282m

{{{a/sin(A)}}} = {{{c/sin(C)}}} 

c·sin(A) = a·sin(C)

sin(A) = {{{(a*sin(C))/c}}}

sin(A) = {{{(415*sin(108.5))/602.862282}}}

sin(A) = .6528096526

    A = 40.75377413°

A + B + C = 180°
        B = 180° - A - C
        B = 180° - 40.75377413° - 108.5°
        B = 30.74622587°

A = 40.8°
B = 30.7° 
C = 108.5
a = 415m
b = 325m
c = 603m

Edwin</pre>