Relative Cartesian and Relative Polar Coordinates Demonstration in AutoCAD

If you have found this video, you're either one of my CAD-100 students, or you just need help and started looking for CAD videos. I've drawn these two "forms" up and dimensioned them so you can see how to draw them using the coordinates ONLY. I DO mess up two steps from the last object, but that shows you I'm human, too.
Chapter 2 of (the textbook I use for MY class) touches on the coordinates, but IF you aren't familiar with graphing and polar angles, you might be a little confused.
Please let me know what you think. Please be constructive in any criticism, and let me know if this was even slightly helpful.
Best Regards,
Lon Anderson
Assistant Professor of CADD