Hello, I'm working on a project for my thesis and I'm trying to make these parallel circles but can't find how, one solution I thought of is drawing parallel planes. Is there any other way i can draw this? Thank you for your time!
There are any number of ways, some easier than others. If you revolve the original part around the center then you can either draw on one of those planes or offset new plane(s) to extrude/revolve this feature.
You can create a perpendicular axis on the surface using a 3D-sketch point on the surface with a "reference axis" through point and surface. After that you can use the sketchpoint, axis and planes through the axis to create features, revolve or extrude.
I think you're already on the right path ... Just use a number of offset reference planes and it should be very straight forward ...