👉 In geometry, a waterplane is a figure that has a plane that contains its vertices and all of their opposite edges. It's often used in 3D modeling to represent objects with flat surfaces or bodies that are not curved. For example, imagine a cube with faces that are squares (like the ones shown below). The square faces would be the waterplanes. Each face is also a plane because it contains its vertices and all of their opposite edges. In 2D space, you can