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, 21:49, January 14, 2008
The '''Parallelogram Law''' for [[Vector|vectors]] asserts the [[Commutativity|commutativity]] of vector [[Addition|addition]]. When the vectors are placed head to tail, they form a [[Parallelogram|parallelogram]], hence the pictorial reason for the name of the law.
[[Category:Calculus]][[Category:Mathematics]]