Drawing The 12-point Ellipse

Below is one of the sets of handouts I gave my games students yesterday as a supplement to the perspective they learned in another class last semester.  Like the line-weight documents I shared last week, I'm presenting these without the attendant lecture and white board demonstration so it's best for people who already know enough about 1,2 and 3-perspective to draw a square on any plane.

I know several people who can easily freehand ellipses while sketching and that's often good enough, but this method has served me well when the ellipses have to be accurate or freehand drawing isn't working well.