Question 1000951
hi there,
Using Cosine Rule.
Cos B = a^2 + c^2 - b^2/2ac
CosB = (11)^2 + (17)^2 - (14)^2/ (2 x 11 x 17)
Cos B = 214/374
Cos B = 0.5722
B = 55 degrees (to nearest whole number)
Hope this helps :-)