The line is one of the very important basic elements of deign The various shapes of form to understand the various structural characteristics are shown in (fig. 6) an angular line has its own dimension as form. Here by adding width to the 2 dimensional lines, how we perceive 3dimensional structure (form) of the line. Likewise showing the structures of various lines such as straight, curved, angular contour in order to understand the visual characteristics of 3 dimensional forms and its structure could be perceived from various lines. The thickness of the line also determines the volume of the structure as shown bellow.

Fig. 6: Different structural forms and their representation as lines.