The geometric shape for a pen is a cylinder.
pushed out of shape
urmumagon
That would be - a Hexagon.
An example would be a cube.
A PentagonPronounce: PEN-TA-GON(The GON part pronounces the same as the word: GONE.)
a shape with nine sides is called nonagon
they are the shape of a pen
a play pen
Oh, dude, a 130-sided shape is called a hecatontagon. Yeah, it's like a polygon on steroids, man. So, if you ever need to impress someone with your geometry knowledge, just drop the word "hecatontagon" and watch them be like, "Whoa, this guy knows his shapes!"
an octogon
A better name for "corners" would be angles, but the shape's name would be a hexagon
A pen.
Kalam
Most mathematicians would call that a 1000-gon. If you want to show off, call it a "chiliagon."
Pen or coop.
A chicken coop.