What is the intersection of a plane with a solid figure?

The intersection of a plane with a solid figure is the set of points where the plane cuts through the solid. This intersection can take various forms depending on the orientation and position of the plane relative to the solid; it can be a point, a line, or a two-dimensional shape (such as a circle or polygon). The specific nature of the intersection is determined by the geometry of both the plane and the solid figure involved.