Add a Concentricity Constraint
- Select Sketch | Constraints | Add concentricity constraint.
- Select the first circle or arc. This circle or arc will keep its position.
- Select the second circle or arc. This circle or arc will move so that it is concentric with the first circle or arc.
- Add more concentricity constraints by repeating steps 2 and 3 or finish adding concentricity constraints by pressing the ESC key or the middle mouse button.