Respuesta :

metchelle
This can be solved using the cosine law wherein two sides are given with the angle between the two sides to find the third side.

[tex] b^{2} [/tex] =  [tex] a^{2} [/tex] + [tex] c^{2} [/tex] -2ac cosФ 

= [tex] 9^{2} [/tex] + [tex] 5^{2} [/tex] -2(9)(5) cos 120

[tex] b^{2} [/tex]= 151

b =12.29 is the length of the third side

Answer:

b = 12.3

Step-by-step explanation:

and A is 39