In AutoCAD, the Polygon command allows you to draw a regular polygon with a specified number of sides and a specified radius or diameter. Here are the steps to use the Polygon command:
Open AutoCAD and start a new drawing.
Type "polygon" into the command line and press Enter.
Specify the center point of the polygon by clicking a point in the drawing area or typing the X,Y coordinates.
Specify the number of sides of the polygon by typing the number and pressing Enter.
Specify the radius or diameter of the polygon by typing the distance and pressing Enter.
The polygon will be created at the specified center point with the specified number of sides and size.
You can also use the Polygon command with the "Inscribed" option to draw a polygon that is inscribed within a circle, or with the "Circumscribed" option to draw a polygon that circumscribes a circle. To use these options, simply type "polygon" into the command line, select either the "Inscribed" or "Circumscribed" option from the command line options, and then specify the center point and size of the circle.