I'm writing this from memory:
Three points X, Y, Z are on a line k, a forth point W is not on k. When WX = WZ, which of the following must be true:
[ 5 Answers in the form of inequalities: WY > WX, etc ]
My question is: What does WX mean? Scalar product of W and X? Length of vector WX?
I was totally confused by this question (came on my GMAT, so I don't know the exact answer choices anymore and don't have an
OA). I didn't find a correct answer with scalar product, and then tried length. Wasted a lot of time on this question
.
Maybe someone can shed a light on how to solve this.
Thanks