Select a tool that allows for a circumscribed polygon.
For example, click Annotate tabDetail panel (Detail Line).
For a circumscribed polygon, the radius of the circle is measured to a side of the polygon.
Click Modify | Place Lines tab (or respective Modify | Place <Element> tab or Modify | Create <Element> tab)Draw panel (Circumscribed Polygon).
On the Options Bar:
Enter the number of sides for the polygon.
Optionally, for Offset, specify a value.
Optionally, select Radius and specify a value.
Note: If you specify a radius, the Offset option is overridden.
Click in the drawing area to specify the start point.
If you have not already specified a radius, move the cursor and click to complete the circumscribed polygon.
Note: You can also use listening dimensions to enter a value for the radius. After you click in the drawing area to place the circumscribed polygon, type the value of the radius and press Enter.