Answer:
Explanation:
I think the problem is that you forgot to make a small circle around point B. Then you would make two circles intersecting line segments CB and BA with the same radius as the small circle before. Then you would draw a line threw the points where the two circles intersect.
Try that out, if that doesn´t work Iḿ sorry. Iḿ doing this on background knowledge so Iḿ not too sure. But, just try it out and tell me if it works :)