a cone.
cone
It is a clyinder.
A sphere or maybe a cone
Cylinder - a solid figure formed by two congruent parallel circles joined by a curved surface.
A solid figure with one circular base and one curved surface is called a cone. It tapers smoothly from the circular base to a single point known as the apex or vertex. The curved surface connects the base to the apex, creating a three-dimensional shape commonly found in various real-world objects, such as ice cream cones and traffic cones.
cone
The answer is a cone
Cone
A figure with 2 circular bases and one curved surface is called a cylinder. Examples are food cans.
The solid figure you're describing is a cylinder. It has two circular bases, but if we consider a cylinder without its bases, it consists of a single curved surface wrapping around the height of the cylinder. Another example of a solid figure with one curved surface and no bases is a cone if we only consider the curved part without the base.
A cone.
A conic section.