Whats 1d look like?
3d 2d, but 1d???
1D is a line so small that it doesn't have measureable thickness but only length. It is usually denoted by a dot. It may also refer to a line that allows forwards and backwards only. Learn more from http://en.wikipedia.org/wiki/Dimension.
i think a stick figure would be 1d
1d is length. 2d is length x height. 3d is length x height x depth.