Question 1000951: Triangle ABC has side a = 11, b = 14,
and c = 17.
Find the measure of angle B to the nearest whole number. Answer by Cromlix(4381) (Show Source):
You can put this solution on YOUR website! 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 :-)
