Euclidean and spherical geometry

[akm3012]

Can anyone give me the solution to this question please?

Let ABC be a triangle in a Euclidean plane. Given that |AB| = 5, |AC| = 7
and AngleA = 130, determine |BC|. (Give the answer correct to one decimal
place.)

 

[stapel]

Let ABC be a triangle in a Euclidean plane. Given that |AB| = 5, |AC| = 7
and AngleA = 130, determine |BC|. (Give the answer correct to one decimal
place.)

I would suggest starting with the Law of Cosines.

 

[akm3012]

Thanks