<em>An angle bisector of an angle of a triangle divides the opposite side in two segments that are proportional to the other two sides of the triangle.</em>
<u>Using the above and the diagram we can see:</u>
To add vectors, simply add the first coordinates from each and then add the second coordinates from each. In other words, add the i terms together and then add the j terms together. So u + v = <0, 2>.