a cone
A solid figure with one circular base and one curved surface is called a cylinder. In a cylinder, the circular base is parallel to the other circular base (if there is one), and the curved surface connects the edges of the base, forming a three-dimensional shape. If it has only one base, it can be considered a cone, which has a circular base and a single curved surface that narrows to a point.
a cone
cylinder
A cylinder. (This isn't a fake answer.)
Cone
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.
A solid figure with one circular base and one curved surface is known as a cylinder. In a cylinder, the circular base is connected to a curved surface that wraps around the sides, extending vertically between the two circular bases if there are two. If it has only one circular base, it can be considered a conical shape, such as a cone, which tapers smoothly from the base to a point. However, the specific description you provided matches a cylinder more closely, assuming it has two circular bases.
The solid shape you are describing is called a cone. A cone has a circular base and narrows to a single vertex, or apex, at the top. Its curved surface connects the base to the vertex, distinguishing it from other solid shapes.
A solid hemisphere has two surfaces: one curved surface and one flat circular base. The curved surface forms the outer part of the hemisphere, while the flat base is the circular face at the bottom.
A solid hemisphere has two surfaces: one curved surface and one flat circular base. The curved surface is the outer part of the hemisphere, while the flat base is the circular section that sits on a plane.
A paraboloid.
A cone would fit the given description.