Sketcher > Creating Sketcher Geometry > To Create a Concentric Circle
  
To Create a Concentric Circle
1. Click Sketch and then click the arrow next to Circle.
2. Click Concentric.
3. Select one of the following entities as a reference:
Arc
Arc center point
Circle
Circle center point
The concentric circle tool opens.
4. Drag the circle to the desired size and click to place the circumference. The circle is created.