A cone.
That sounds like a cone. One surface is a circle and the other surface is curved.
semi-circle
Cone
a coneType your answer here...
The curved outer surface of a circle is the perimeter.
A sphere has a total curved surface. A cylinder and a cone have a partial curved surface
a sphere has no bases and it only has one curved surface
curve surface area
the enclosing boundary of a curved geometric figure, esp. a circle. the distance around a circle
circle
Partly.
cornet