Not technically. But it’s useful to think about triangles to understand the difference between level lengths. Say you lift one end of a level off an unlevel surface, to get an idea of where the level is. If the level is 8 feet long, the sides of the triangle between the level and the surface can be 8 feet long.
Sometimes it’s easier to get a realistic picture of what needs to happen with a longer level. As well, longer levels let you draw longer lines. This can be helpful for layouts or spans.