For example, the aspect ratio of an earlier standard-definition (SD) screen was 4:3, which is a relatively square rectangle. The 4:3 means "4 to 3," or four units wide to three units high.

As an example, 8:5, 16:10 and 1.6:1 are the same aspect ratio. In objects of more than two dimensions, such as Hyperrectangles, the aspect ratio can still be defined as the ratio of the longest ...