Given two vectors A-bar and B-bar with magnitudes A and B, respectively, you can subtract B-bar from

Question:

Given two vectors A-bar and B-bar with magnitudes A and B, respectively, you can subtract B-bar from A-bar to get a third vector C-bar = A-bar - B-bar. If the magnitude of C-bar is equal to C = A + B, what is the relative orientation of A-bar vectors and B-bar?