Donut on Onshape
its a donut for cad
Supplies
access to onshape
Create a Document
open a new document, name it anything you want
Create a Sketch
make sure to select one of the planes
Add Two Parallel Lines
one should be smaller then the other
Add a 3 Point Arc to One of the Lines
put a 3 point arc on the smaller line
Revolve Around the Bare Line
select the 3 point arc, and then choose the longer line as the revolve axis
Done
voilà