Question

A ship travels due west for 90 miles and turns to travel 80 miles in the northwest direction, at a 120° angle. How far is the ship from its original position?

Answer 1

You can use the Cosine RUle to solve this 

x^2 = 90^2 + 80^2 - 2*80*90 cos 120 =   21700
x  = sqrt 21700 =  147.31 miles to nearest hundredth   Answer