# Either u v or v u are acceptable answers the di ff

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Either u - v or v - u are acceptable answers. (The di ff erence will be whether the arrow for the third side points towards u or towards v ). Problem : Find the sum of the vectors which make up the vertices of a regular pentagon centered at the origin. The sum of the vectors, which you can find using the geometric method for vector addition, should turn out to be zero. An easy way to see this is by noticing that if you rotate the pentagon by an angle of 2 Π /5, you will recover exactly the same same pentagon, with exactly the same vectors defining its vertices. Thus, whatever vector you obtain by adding up the five vectors, it should remain unchanged under such a rotation. Only the zero-vector (the origin itself) doesn't move when you rotate the plane, hence this is the only possible candidate for the result of the sum. Prev Section Next Section 7 "crazy" women literature who w actually being totally reasonab 8 "gross" things we're reclaiming behalf of girls everywhere Harry Po ! er vill ranked from "ki evil" to "literally WORST" QUIZ: What's yo make-out style? Pride and Prejud as told in a serie of texts Every Shakespe play summed up a single senten 5 literary antagonists wh were technicall the good guys, you think about Valentines from fictional charac Take a Study Break! Share 70 By keyword

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