puzzling question

hi everyone

this is a question for a school assignment that has been puzzling me and my friends for awhile. It's getting to the point where we think it's impossible! It's a bit hard to describe so I drew it up in paint, this is the link to the picture.

http://img226.imageshack.us/img226/1728/question9ne.gif

I would really appreciate it if you had a look at it and gave me your thoughts?

Thanks heaps in advance!
njlw

CX = CD - XD (14km - X)

CD is irrelevant. Ignore that bit of information and the solution should be obvious: BC² + CX² = BX²

I can see why you're having difficulty with the question, it's rather ambguous.

Kberry, why do you assume XD = X ??? X is not a distance, but the label to a vertex. It's not a dig, I'm just curious, becvause I think you might be on to something!