(There would be a class room assignment for further exploration of various structures of forms)

Further following three separate aspects should also be counted in a line.

The Overall Shape:

This is the general appearance of a line such as straight, curved, bent, kinked, angular etc.

The Body:

As a line has some amount of width its body is contained within two edges and the relationship between these two edges determines the shape of the body. Usually these two edges are smooth or parallel, but sometimes, they may appear converging, diverging or irregular as shown in Fig.7.

Fig.7: Forms with regular and irregular edges and their representation as lines.

c) The extremities:

This feature is usually not considered when the line is very thin, but when the line is a thick structure or broad, then its extremities become visible. Here extremities mean the starting point and end point on the line as line itself is a combination of points in a row. (Fig.8).

Fig.8: Forms with regular and irregular extremities and their representation as lines.