A cone.
It has a flat base, a curved surface area, a circular edge and one vertex.
a cone
A cylinder.
A cone.
A cone.
A cone.
A cone.
A sphere has one surface that's also curved and has no base.
It has a flat base, a curved surface area, a circular edge and one vertex.
It has just the one curved surface area and and its base
A hemisphere has no edges. It has one curved surface that smoothly transitions from the curved side to its base.
circular
One if it is solid, two if it is hollow
it is a cone.
a cone
A cylinder.