What is the dichotomy in photography?

When observing the scene through the viewfinder, imagine dividing the picture into three equal parts. The intersection of lines is the place where the interesting center and other minor scenery are arranged. Of course, this rule can be used flexibly, and the center of interest does not have to be exactly at the intersection, but it should also be roughly in that area. Those intersections at the right end of the picture are usually considered to be the strongest; Of course, the left third is sometimes used to arrange interesting centers, depending on how the picture is balanced. Trigonometry applies to horizontal and vertical frames. Arrange the subjects and companions according to the trichotomy, and the photos will be compact.

Excerpt from Pacific computer network