Form is an element of art which is used to create a three dimensional object. It is three dimensional and has volume because it has length, width and depth.
There are different types of forms which are:
Geometric forms: This are objects with mathematical descriptions such as cube, pyramid, cylinder and so on.
organic or free forms: This forms are irregular and mostly occur in nature such as cloud, mountain, trees etc.
Three dimensional media: This forms are usually used in producing a sculpture.