Hi, I'm new to SolidWorks and this forum so if I am not showing proper adequate I apologuise.

I would like to know how to dimension a cylinder as shown in the image below, I tried searching for the answer but I imagine I don not have the terminology right.  The view I must show is half the part, the only thing I have to work with is the top edge and the center line, simular to a section view.

Thanks in advance for your help!!

Jamie