The answer is - a cone.
a cylinder
flat
A "hemisphere" - a ball that's been cut into 2 equal parts. i.e "half a sphere".
A Cone
A cone. It has a circle for the base, and a curved face tapering to a point.
The answer is - a cone.
Semi Circle
2D = semi circle 3D = hemisphere
cylinder circle
It could be a semi-sphere but mostly it's a cone.
There cannot be such a shape. It is not a cylinder because a cylinder sdoes not have a rectangular face. A rectangle must be a flat face and the only flat faces in a cylinder are the circle faces. The curved face can be "opened out" into a rectangular shape but because the face is curved it cannot be rectangular.
a cone
a cylinder
flat
A "hemisphere" - a ball that's been cut into 2 equal parts. i.e "half a sphere".
A Cone