Posted by **sarah A** on Tuesday, April 13, 2010 at 12:03am.

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).

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