How about a cylinder, a cone and a sphere
sphere, cylinder, cone
trapezoids, parallelograms, and hexagons
A cone and a cylinder are two of them
Three-dimensional figures with a curved surface are not considered polyhedrons because polyhedrons are defined as solids with flat polygonal faces, straight edges, and vertices. Curved surfaces lack these flat faces and straight edges, which are essential characteristics of polyhedrons. Examples of shapes with curved surfaces include spheres and cylinders, which do not fit the definition of a polyhedron. Thus, the presence of curved surfaces distinguishes these figures from polyhedra.
A cylinder
A cylinder perhaps.
The top and bottom flat surfaces (the 2 circles or ellipses) and the curved surface make up the 3 surfaces.
a hexagonal prism has 0 curved surfaces
2 flat and 1 curved
2 flat surfaces unless it is rolled up in which case it has 2 curved surfaces.
A triangular prism contains zero curved and 5 flat surfaces.
Both are 3-dimensional figures wiith a curved surface.