At Worlds of Fun there is a bumper car ride called "Der Fender Bender". For some reason I'm calling this, that.
This, "that" which I speak of is a tubing bender. First we need to know the radius.
Then we need two pieces of plywood, or something that will work.
Then draw the inside and outside radius on the pieces of wood. And screw these two pieces of wood together.
The trick now it to cut the radius at an angle. I'm able to adjust my circular saw to cut at a 45 degree angle.