3*pi*r2
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 cylinder or a cone. Or a hemisphere.
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.
A Semi-Sphere :)
curve surface area
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 cylinder or a cone. Or a hemisphere.
It is a cylinder
One if it is solid, two if it is hollow
curve surface area
A Semi-Sphere :)
Circle
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.
cone
One if it is solid, two if it is hollow
Cylinder - a solid figure formed by two congruent parallel circles joined by a curved surface.
That sounds like a cone. One surface is a circle and the other surface is curved.