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# C4 Vectors watch

1. How do I solve this question? I'm a lil' stuck >.<

Points A,B and C have position vectors a=(2,1,2) b=(-3,2,5) c=(4,5,2) respectively , with respect to a fixed origin. The point D is such as ABCD, in that order is a parallelogram. Find the position of vector D.

Can someone explain the way to solve this please ^^
2. You know that to be a parallelogram, AB and CD are opposite sides with the same length, and because they are parallel are given by the same vector. So work out AB and deduce what D must be so that CD produces the same vector

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Updated: February 1, 2010
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