Question

suppose vector U=<1,-2> and V=<-5,5> form two sides of a parallelogram. Then the lengths of the two diagonals of the parallelogram are...?

Answer 1

How do you know which direction the vectors point in?

Answer 2

I am doing this without loss of generality.

Answer 3

In other words, I can point them in any particular direction, and I'm not saying they have to be in that particular direction because it would still apply.