A cylinder.
The geometric shape for a pen is a cylinder.
A cylinder.
A sphere intersected by a plane, An circular ellipsoid intersected by a plane, A cylinder, A cone, and many more shapes, some of which don't even have a name!
probably a cylinder
A cylinder.
The geometric shape for a pen is a cylinder.
It is a cylinder.
cylinder
A cylinder.
A sphere intersected by a plane, An circular ellipsoid intersected by a plane, A cylinder, A cone, and many more shapes, some of which don't even have a name!
a round
There is no name but a cylinder is the nearest standard geometric shape.
...a cylinder...
probably a cylinder
3-D a circle on each end
The total distance around a plane geometric shape, i.e. one drawn on a piece of paper, is called the shape's perimeter.