stepS iN gRaPhIcaL mEthOd

select a scale and accurately draw the vector to scale in the indicated direction.

sketch a parallelogram around the vector: beginning at the tail of the vector, sketch vertical and horizontal lines; then sketch horizontal and vertical lines at the head of the vector; the sketched lines will meet to form a parallelogram.

draw the components of the vector; the components are the sides of the parallelogram; be sure to place arrowheads on these components to indicate their direction (up, down, left, right).

meaningfully label the components of the vectors with symbols to indicate which component is being represented by which side; a northward force component would be labeled Fnorth; a rightward velocity component might be labeled vx; etc.

measure the length of the sides of the parallelogram and use the scale to determine the magnitude of the components in real units; label the magnitude on the diagram.

http://www.physicsclassroom.com/Class/vectors/u3l1e.html