The sum of vectors does not depends on the order to calculate the sum.
$(\vec{A}+\vec{B})+\vec{C}=\vec{A}+(\vec{B}+\vec{C})$

You can select one of the order 123,132,231,213,312,321
and find the sum of three vectors.

/htdocs/ntnujava/ejsuser/2/users/ntnu/fkh/vector3sum_pkg/vector3sum.propertiesFull screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list