Constrains two arcs, circles, or ellipses to the same center point.
Access Methods
Button
Toolbar: Drafting tool set 
Parametric tool group Geometric Constraints flyout Concentric Menu:
Parametric
Geometric Constraints
Concentric
Summary
This command is equivalent to the Concentric option in GEOMCONSTRAINT.
Following are the valid constraint objects and points:
- Circle
- Arc
- Polyline arc
- Ellipse
List of Prompts
The following prompts are displayed.
Select first object: Select a circle, arc, or ellipse
Object
Selects an object to be constrained.
- First object
-
Selects the first circle, arc, or ellipse to be constrained.
- Second object
-
Selects the second circle, arc, or ellipse to be constrained.