Plane is the area provided to us for drawing in autoCAD. It may be of 2 types 2D plane or 3D plane, while viewing a 2D plane we can only see a 2D view of our drawing and on a 3D plane a 3D model created in autoCAD can be viewed.
The three Dimensional maps created a revolution in the field of navigation and medical and also in the engineering field. The advantage of 3D maps are that it can give the idea of all the dimensions and hence better designs can be created by looking at the 3d maps and the conventional maps were not that much informative compared to 3D maps are
Computer Aided Design (CAD) is the general term for MANY different softwares used to create 2 dimensional (2D) drawings and 3 dimensional (3D) products. This could be for any thing. home products, cars, houses, the world! AutoCAD is a pioneer in CAD and primarily 2D (*.dwg format - still a 2D standard widely used and translated from many other softwares) A small sampling of 3D software is Solidworks, ProEngineer (ProE), Inventor, Catia. Most if not all CAD will do 2D & 3D but as it is a 3D world, most are migrating to 3D tools primarily with 2D as an add-on. There are of course MANY other softwares in CAD and then there is CAM (Computer Aided Manufacturing), CNC (computer Numerical Control) translators between the many options are also available (STEP, IGES, STL etc).
By adding the stairs and then you press the arrows then go to 2d mode then you can make the upstairs
Drafting is a 2D or 3D representation of a model or building that can be changed and modified to to the drawer's liking. It is common to use AutoCad in this and will be used by drafters and designers.
A camera is a 3D shape. A photograph is a 2D projection of a 3D shape onto a 2D shape.
2d
A television set is a 3D shape. The image (picture) on the television screen is a 2D shape. 3D is when it has length, width, and height. 2D is only length and width.
It's a 2D shape.
A piece of paper is 3D.
2d
2D.
a pyramid is a 3D shape :)
It's a 2D shape.
Paper is a 3D object.
3D
A nonagon is a 2D shape and there is not a 3D equivalent shape.