Geometric shape: Precise shapes that can be described using mathematic a formulas, like square, triangle, circle etc. - www.irvingisd.net/macart/glossary.htm


Organic Shape: Leaf, seashells, flowers.  We see them in nature and with characteristics that are free flowing, informal and irregular. - tms.talawanda.net/~hunschej/classroom/page15/page15.html


Symmetrical shape: Made up of exactly similar parts facing each other or around an axis; showing symmetry - www.google.com


Asymmetrical shape: Having parts that fail to correspond to one another in shape, size, or arrangement; lacking symmetry - www.google.com 


Radial balance: the balance as the result of components that are distributed around a center point or spring out from a central line. - www.bluemoonwebdesign.com/art-glossary-3.asp