Perspective drawings are the most realistic types of drawings used in engineering and technology. A perspective drawing creates a pictorial view of an object that resembles what you see. It is the best method for representing an object in three dimensions. The basic concepts of perspective sketching are presented in Chapter 7. Chapter 12 goes into the details necessary for creating perspective drawings with instruments or CAD. The chapter describes perspective projection theory and the associated terminology necessary to create one-, two-, and three-point perspective drawings.