a sphere or an ellipsoid.
Sphere
A figure that has a curved face or curved edge.
A sphere has just one curved face.
A cone.
A paraboloid.
Get a ball. Draw any closed shape on it. The part inside the curve that you drew is one curved face and that is contained by the surface of the ball which is the other curved face.
A hemisphere
it is a three dimensional cone , the circle is the edge of the figure and the curved side is the body of the cone, the vertex is the point of the cone
a cone
Cone.
One flat face and one curved face.
a cone