Using the Law of Sines

[soccergirl]

How do you use the Law of Sines to find an angle of a triangle when only given two lengths? Example, a car is driven 80 km west and 30 km southwest. What is the displacement of the car from the point of origin (Magnitude and direction)? Thank you for any help!

 

[tkhunny]

You are not given only two lengths. You also have the angle between them. "west" and "southwest" provide this information.