Respuesta :

studentbiophychem

So the total value of a triangle is 180°

So when u calculate the missing angle its value is 42°

180°-(60°+78°) = 42°

choixongdong

Answer:

a = 5.3

<C = 42°

Step-by-step explanation:

<C = 180  - (60 + 78)

<C = 42°

Law of sines:

a/sin(60) = 6/sin(78)

a = sin(60)*6 / sin(78)

a = 0.866 * 6 / 0.978

a = 5.3

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