To Place a Regular Polygon with the Radius Keyed In
Select the Place Regular Polygon tool ( split button).
In the tool settings window's Radius field, key in a non-zero value.
Set Method to Inscribed or Circumscribed.
Enter a data point to define the center.
Enter a data point to define the orientation.
Repeat steps 4 and 5 to place an additional polygon.
Place Regular Polygon with Radius keyed in. Method is Inscribed (left), Circumscribed (right).