1. The problem is to understand the definition and properties of a prism. 2. A prism is a 3-dimensional solid characterized by having two identical and parallel faces called bases. 3. These bases are congruent polygons, meaning they have the same shape and size. 4. The other faces of the prism, called lateral faces, are rectangles or parallelograms that connect corresponding sides of the two bases. 5. This structure ensures that the cross-section parallel to the bases is always the same polygon, which is a key property of prisms. 6. Understanding these properties helps in calculating volume, surface area, and other characteristics of prisms in geometry.