So after reading and trying to figure out this circle geometry math, I just decided to free hand it...sorta. I took another skirt that I had and used that as a template. But I squared off the ends just a touch to give it the "pointy" look. I made a higher band then normal too, this is because I want to be able to wear this out and about with the kids and not feel like my shirts are riding up, Hey, gotta be stylish even at the playground.
Once I had it completed, it was very see-through so all I did was make another circle part to add to the inside. This one I cut about one size smaller. I didn't want it to get to bunchy and wanted to be free flowing. Being that it was really stretchy knit, it worked out perfect.