Cylinders
2 plane faces, 1 curved face
A cone. It has a circle for the base, and a curved face tapering to a point.
sphere
False. Cylinders have a circle at each end and a curved surface between: think of a cigarette!
hemisphere
a cone
A cone?
A cone. The base is circular and curved, and the tip of the cone is the vertex.
There is only 1 curved face!
Prisms have polygonal cross sections and several rectangular lateral faces. Cylinders have circular cross sections and one curved lateral face.
It is a cone