In order to obtain a better understanding, it might help to measure some angles. You can measure the
z by selecting the pencil icon from the palette and placing it over the positive x-axis and then on the
the marked angle with your selection tool, then under the Measure Menu, select Angle. Do the same
vi’ and for vector zw.
13. It might also be helpful to measure the length of zw (remember to make it unit-less).
angle for vector
vector z. Select
thing for vector