A sphere is completely curved, a ball shape. The shape has a constant cross section. It is a prism.The cross-section is a pentagon.The 3D shape is a pentagonal prism. For all polyhedra the number ...

A 3D shape with a circular cross-section is a cylinder. A cylinder is not a prism because the circle is not a polygon. Image caption, The total surface area of a prism is made up of the areas of ...