variables:
depth or 1/2 depth
thickness
height
glassThickness
etc...
create a solid based on that information and your arc.
create another solid based on the same information using the thickness variable as a starting z value. Do some math to get the proper height and length of inner hole. Use subtract to cut it out. Create another one using the same values you got for the cutting object except change thickness. For fun, create them on different layers.
Open the vlide and the help file and look for the garden path tutorial. Learn to create that. It will be a great help in figuring out what I'm talking about and will take you a long way to learning how to put simple syntaxes together. This project doesn't appear simple on the surface, but if you break it down into parts, it will be much simpler.