Head-to-Tail Vector Addition
To add two (or more) vectors together graphically using the head-to-tail method you simply draw the first vector anywhere you wish, and then draw the second vector with its tail at the head of the first vector. If there are more vectors to be added draw each one with its tail at the head of the preceding one. The sum or resultant is a vector drawn from the tail of the first vector to the head of the last vector. It does not matter in which order you add them.
Note the head-to-tail placement when running the applet at the right, with the resultant vector shown in red.