1st: Concentric
2nd: Centrifugal
3rd: Centripetal

I feel as though I didn’t follow the three main radiation structures but combined them. For the 1st, I started with circles within circles, then layered the circles in left, right, top and bottom directions. The 2nd, I started with the line tool to make a basic shape, continued with a star tool (added more vertices) and used the pen tool using white to make the white lines in the star. For the 3rd, I used the line tool, created a design, then used the warp and twirl tools.