A sphere has one surface that's also curved and has no base.
A cone.
One if it is solid, two if it is hollow
A cone has two faces: one circular base and one curved surface. It has one edge, which is the intersection of the curved surface and the base. A cone has two vertices: one at the apex (top point) and one at the center of the circular base.
A curved surface is like imagining a sheet of paper that is bent or a flag waving in the wind. A curved edge is like an elastic stick bent in one(C curve) or more points(S curve). The curved surface beeing 3 dimensional(3D) and the curved edge 2 dimensional(2D) unlike the simple surface and edge which are 2D respectively 1D.
Circle
A paraboloid.
It has just the one curved surface area and and its base
A cone.
A cone.
A cone. A hemisphere.
cone
Just one at the base, the rest is a curved surface
A paraboloid.
a sphere
A cone.
A hemisphere has no edges. It has one curved surface that smoothly transitions from the curved side to its base.
a cone