Unity UI Pie Chart / Fraction Circles

Hey guys, I had a great idea in my head for an interactive pie chart sort of thing but as soon as i jumped on Unity i realised I had no idea how to draw circles on ui; Is it possible to draw primitives onto ui? and also is it possible to only draw fracitons of it say 20% then i would progressively make more parts of it to make a full circle. I did some research in the docs but all i could find was Handles.DrawSolidArc and afaik that is only used in objects and not ui. I've also seen some 'solutions' to just render a quater or how every much your need of an image, but that is not very flexible.