SHAPE! ~ Anastasia Zagurskaya

Shape is an area that stands out due to the boundary that surrounds it, change in color, value, or texture. Do not confuse shape with a form! They do share some similarities, but essentially they have different meanings. Form is a 3-dimensional figure, whereas shape is 2-dimensional or flat.
Shape is pretty much an essential component of art, without it artwork wouldn't be complete.

SHAPE:





























 FORM:




Sources:
http://arthistory.about.com/cs/glossaries/g/f_form.htm
http://www.studiocodex.com/shape01.html
http://tobyblair.wordpress.com/about/