Question

Let u = [2,−3, 1] and v = [0, 1, 4]. Calculate the vector u − v. Place u and v tail-to-tail to form two sides of a triangle. With regard to this triangle, what does u−v represent?
Calculate the number u•u and discuss its relevance to the diagram you have drawn. Do the same for the number
(u − v) • (u − v).

Answer 1

If you are studying vectors the above question cannot be made much easier.

I suggest just following the very explicit instructions.