I is the incenter of triangle ABC. We have CE=15, AE=9, and AB=12. Find BF.
I am guessing "F" is the incenter of the triangle. (i think I've seen and solved this problem before...). But just to clarify, could you please send an image?
"F" could also be an altitude, median, or perpendicular bisector...we really need an image to help you.