I believe that is an elipse.But don't bet on it.
perabale
Cone
A cone.
A sphere intersected by a plane, which could be a hemisphere. Alternatively, a cone, or a paraboloid.
Cylinders
A cone. It has a circle for the base, and a curved face tapering to a point.
perabale
sphere
hemisphere
A cone?
Its an Cylinder
Semi Circle
fwf
Cone
A cone.
A cone would fit the given description
A cone.