Composition/Abstracts

Diagonal:  

A diagonal concept should be comprised of an image in which the object is shown/taken at a sideways angle.  

Triangle:

In the triangle composition, the subject of the image should be triangular shaped.  The tricky part to creating a triangle composition is finding an object that is triangular shaped and not something that has triangle like shapes within the overall structure.

Rule of Thirds: 

When composing a rule of thirds image you need to keep the main subject on 1/3 of your screen.