Triangular composition is a way of organizing a picture in ways that the frame is divided into a triangle. A famous example of this is the Mona Lisa the picture is arranged in a way that the head and shoulders appear to be triangular. In these photos, you should look for elements that hint at being triangular. The one-thirds composition is when the picture is arranged with the focus being on one-third of the frame while the other two frames are blank or not the main focus. When viewing these images look for the two vacant frames. diagonal composition is when one line or two crosses the frame separating it into two or more sides. This results in the frame tending toward more diagonal and if you squint your eyes the photo appears to move or slide diagonally.