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Cone
That sounds like a cone. One surface is a circle and the other surface is curved.
the enclosing boundary of a curved geometric figure, esp. a circle. the distance around a circle
A riddle is: I am a polyhedron I have two surfaces one of my surfaces is formed by a circle the other face is curved what am I?
One dimensional objects are lines, straight or curved. For example a line segment, a circle, a parabola, an ellipsis etc...
a coneType your answer here...
a cone...
Cone
That sounds like a cone. One surface is a circle and the other surface is curved.
I may be the upper or lower half of any oblate or prolate spheroid.You'll never know.bwahahaha
the enclosing boundary of a curved geometric figure, esp. a circle. the distance around a circle
semi-circle
A cross section of an ellipsoid or sphere. A cone. A [right] truncated paraboloid (like the reflector of a car headlight). There are several others.
A cone.
There seem to be lots of answers to this question, all saying cone.What about the poor lonely sphere? Split it in two by anyintersection with a plane and each piece will fit the question.
A riddle is: I am a polyhedron I have two surfaces one of my surfaces is formed by a circle the other face is curved what am I?
a hexagonal prism has 0 curved surfaces