JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. Ellipsoid (3D only) Used to place an ellipsoid, a solid defined by three radii. You can access this tool from the following: Ribbon: Modeling > Solids > Primitives Toolbox: Primitive Solids SettingDescription Primary Radius If on, sets the primary axis radius for the ellipsoid. Secondary Radius If on, sets the secondary axis radius for the ellipsoid. Tertiary Radius If on, sets the tertiary axis radius for the ellipsoid. Key-in: PLACE ELLIPSOID To Place an Ellipsoid Using Accudraw Parent topic: Creating Solids