Abstract
This chapter focuses on the hollow objects made from sheet material. An object can be made from thin sheet metal, and it is drawn either in first angle, third angle, or isometric projection. From one of these projections, a developed shape or a development can be drawn. The chapter discusses the development of various shapes such as cylinders, spheres, square pyramids, and cubes. The chapter illustrates a hollow square pyramid with its upper portion removed, leaving a sloping face. It also presents a drawing of a hollow square pyramid 2 in base and 2½ in vertical height, which has the upper half removed, leaving one sloping and one flat face joined on the center line.
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