POLYGON Command:
AutoCAD
Command List
The POLYGON command allows you to create regular polygons (polygons
with equal sides and angles).
To select the Polygon
Command you can:
select Polygon
under the Draw Menu,
OR
type polygon and then press ENTER at a
Command: prompt,
OR
click on the Polygon 
button.
--Prompt: Enter number of sides <4>: Type in a value for the
number of sides for the polygon.
--Prompt: Specify center of polygon or [Edge]: Select the
location for the polygon's center with an Absolute
Coordinate, a Relative Rectangular Coordinate,
a Relative Polar Coordinates, or an Osnap
and press Enter.
--Prompt: Enter an option [Inscribed in circle/Circumscribed about circle]:
Type i (for across the corners) or c
(for across the flats) and then press Enter.
--Prompt: Specify radius of circle: Type a value for the radius
and press Enter.
NOTE: A polygon is a group or single entity in AutoCAD. To modify a polygon,
you must Explode it first.
Return to the AutoCAD Command List.