Draw a torus (donut shape):
 Classic: torus is drawn from a 3D polyface mesh (left).
 Other license levels is drawn as a 3D solid (right).
Accessing the Command
command bar: torus
menu bar: Model 3D Solids  Torus
ribbon: Solid  Create  Primitive  Torus
toolbar: 3D Solids 
: Torus
Prompts you in the command bar:
Center of whole torus: <0,0,0> (Pick a point, or enter x,y,z coordinates.)
Set Radius of whole torus or [Diameter]: (Specify the outer radius, or press D)
Set radius of body of torus [Diameter]: (Specify the tube radius, or type D)
Command Options
Option 
Description 
Center of whole torus 
Specifies the center of the torus:

Radius of whole torus 
Specifies the overall radius of the torus; note that the distance is measured from the center of the tube (body). 
Radius of body of torus 
Specifies the radius of the torus body, or tube. It is not necessary for the body radius to be smaller than the whole radius. 
Diameter 
Specifies the diameters of the whole torus and/or body. 
Related Commands
Box  creates 3D boxes as solid models.
Cone  creates 3D cones as solid models.
Cylinder  creates 3D cylinders as solid models.
Dish  creates the lower half of 3D balls as solid models.
Dome  creates the upper half of 3D balls as solid models.
Extrude  extrudes 2D entities into 3D solid models.
Interfere  creates 3D volumes of intersecting 3D solid models.
Intersect  removes volumes not in common between two solid models.
MassProp  reports the mass properties of 3D solid models and 2D regions.
Pyramid  creates a pyramid as a 3D solid (Pro and Platinum). Creates a pyramid as a polygon mesh (Classic)
Revolve  revolves 2D entities into 3D solid models.
Slice  cuts 3D solids into two parts.
SolidEdit  edits the bodies, faces, and edges of 3D models.
Sphere  creates 3D balls as solid models.
Subtract  removes one solid model from a second.
Union  joins two or more solid models into a single entity.
Wedge  creates 3D wedges as solid models.