3D Primitives and Conversions - Autodesk AutoCAD 2013 Practical 3D Drafting and Design - page 147

The options available for this command are:
• Edge : Instead of center and radius, we specify two points that define
one of the sides for the base of the pyramid, similar to the option of the
POLYGON command.
• Sides : This allows us to change the number of sides of the polygon that
define the base of the pyramid.
• Inscribed / Circumscribed : The polygon that defines the base of the pyr-
amid can be inscribed (the radius defines the distance to vertices), or cir-
cumscribed (the radius defines the distance to midpoints).
• 2Point : This allows us to define the height of the pyramid by two points.