We add vectors together by putting them head to tail.[br]As the addition is commutative it doesn't matter if we add [math]\text{\vec{a}}[/math]+[math]\text{\vec{b}}[/math] or [math]\text{\vec{b}}[/math]+[math]\text{\vec{a}}[/math].[br]In absolute terms, we add them together by sum up the components.[br][math]\text{\vec{a}}+\text{\vec{b}}=\binom{a_x}{a_y}+\binom{b_x}{b_y}=\binom{a_x+b_x}{a_y+b_y}=\binom{c_x}{c_y}=\text{\vec{c}}[/math]