In this example a primitive cone will be created using Primitive Dynamic. The Cplane is set to 1 and the display view is set to 7.
Choose Create>Primitive Solid>Dynamic and in the Dynamic Primitive Type Options select Cone/Cylinder.
Click on the Options tab and then on the Show more options for primitive type and enter values as shown below. Cursor place the cone in display.
Note the 3 sets of dynahandles. The top dynahandle will control both the height and radius/angle of the upper edge. The single dynahandle below will control the major radius while the dynahandle with 6 handles + origin will control the position and orientation. Single left click + hold on a handle and drag it to modify as needed or right click on a handle to get additional options.
Right click on the major/Upper dynahandle origin and use Syn Radius to effect both when moving either radius (unchecked they will move independent of each other.)
You can enter values in the dialog to modify the pyramid as well as using the dynahandles.