Draws 3D pyramids:
 Classic: pyramid is drawn from a 3D polyface mesh.
 Shape, Pro and Platinum: pyramid is drawn as a 3D solid.
Accessing the Command
command bar: pyramid
alias: pyr
menu bar: Model  3D Solids  Pyramid
ribbon: Solid  Create  Primitive  Pyramid
toolbar: 3D Solids 
: pyramid
 Command sequence in Pro and Platinum:
You are prompted:
Specify center point or [Edge/Sides]: (Pick a point, enter coordinates, or choose an option)
Specify base radius or [Inscribed]: (Type a value, pick a point, or choose an option)
Specify height or [2Point/Axis endpoint/Top radius]: (Type a value, pick a point, or choose an option)
 Command sequence in Classic:
You are prompted:
First point for base of pyramid: (Pick a point, or enter coordinates)
Second point: (Pick another point, or enter coordinates)
Third point: (Pick a third point, or enter coordinates)
Tetrahedron/<Last point for base>: (Pick the last point, enter coordinates, or type T)
Set apex of pyramid or [Ridge/Top surface]: (Enter an option, pick a point, or enter coordinates)
Command Options in Pro and Platinum
Pro and Platinum Option 
Description 
Specify center point 
Specifies the center of the pyramid's base: (pick a point or enter x,y,z coordinates.) 
Sides 
Specifies the number of sides (or vertices of the base); prompts you: Enter number of sides <4>  (Type a number, or press Enter to accept the default) 
Edge 
Specifies the length of the edges of the base face; prompts you:
As you move the cursor for the second point, the program ghosts an image of the pyramid. 
Specify base radius 
Specifies the radius of a circle inscribed by the base of the pyramid; prompts you: Specify base radius or [Circumscribed]  (enter a value, specify a point, or else enter C to switch to defining a circumscribed base) Inscribed means that the size of the base is the double the distance from the center point to one of the midpoint of the base: 
Circumscribed 
Specifies the radius of a circle circumscribed by the base of the pyramid; prompts you: Specify base radius or [Inscribed]  (enter a value, specify a point, or else enter I to switch to defining an inscribed base) Circumscribed means that the size of the base is determined by double the distance from the center point to one of the vertices of the base: 
Specify height 
Sets the height by picking a point or entering x,y,z coordinates 
2Point 
Set the height of the pyramid by specifying two points, such as along another entity; prompts you:

Axis endpoint 
Sets the length and orientation of the pyramid's axis by specifying the top of the pyramid, creating a rotated pyramid; prompts you: Specify axis endpoint  (specify a point or enter x,y,z coordinates) 
Top radius 
Allows to create a truncated pyramid; prompts you:

Command Options in Classic
See the Ai_Pyramid command.
Grips Editing
Pyramids made of solid models can be edited directly through grips:

Select the pyramid. Notice that it has several grips.

Drag a grip to move the pyramid. (All grips perform the same function: move.)
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.
Torus  creates 3D donuts as solid models.
Union  joins two or more solid models into a single entity.