a giant or small cone
A sphere sliced by a plane; or a cone.
sphere
A CYLINDER.
sphere
Cylinder
Cylinder
A sphere.
its a lens...1 curved edge = a circle, 1 flat surface = back, 1 curved surface = front. (these are used in some battery-less flashlights, as an example.)
cylinder
a circle ??
a giant or small cone
well.....a cone or a cylinder??
A sphere sliced by a plane, eg a hemisphere.
Prism
A sphere sliced by a plane; or a cone.
A semicircle is one shape fitting this description.