Form: While shapes are 2-dimensional figures, form is 3-dimensional figures.
Geometric Form: Form that has hard, defined lines and angles.
> The photo to the left is an example of geometric form. The viewer can easily identify the geometric form of each balcony, which are like rectangular prisms.
> The photo to the right is an example of geometric form. From the photo, we can see geometric form of pentagonal prisms.
Organic Form: Form that is loose and undefined.
> The photo to the left is an example of organic form. The viewer can easily identify the organic, loose and undefined, form of the seashell.
> The photo to the right is an example of organic form. The viewer can easily identify the organic, loose and undefined, form of the rock formation.