One.
One.
One.
One.
There is 1 curved surface on a sphere
A sphere has one continuous curved surface.
One curved surface (two if it is hollow) and no edges.
It is curved
How about a cylinder, a cone and a sphere
sphere, cylinder, cone
A cone, cylinder and a sphere are three examples.
Sphere, ellipsoid, torus, paraboloid, hyperboloid are shapes with only curved surfaces. Hemisphere, quadrant, cone and cylinder are examples of shapes with curved and plane surfaces. There are, of course, many others.
A solid that has only curved surfaces is a cylinder or a sphere. However, the sphere is the most common example of a solid with exclusively curved surfaces, as it is perfectly round and has no flat faces. In contrast, a cylinder has two flat circular bases in addition to its curved surface.
One if it is solid, two if it is hollow
2 flat and 1 curved
A solid sphere has one continuous surface. This surface is smooth and curved uniformly, with every point on the surface equidistant from the center of the sphere. Unlike polyhedral shapes, which have multiple flat faces, a sphere is defined by this singular, seamless exterior.