if BC = 2AB, then compute B'C'/A'B'

To compute B'C'/A'B', we need more information about the figure or diagram you're referring to. BC = 2AB implies a geometric relationship among points B, C, and A. However, without a specific diagram or values associated with those points, it is not possible to determine the exact values of B'C' or A'B'.

To calculate B'C'/A'B', we would need the lengths or coordinates of points B', C', A', and potentially additional information about the shapes or properties of the figure they belong to.

If you can provide more details or a specific diagram, I would be happy to guide you through the process of finding B'C'/A'B'.