you are a cone
The square based pyramid does not stack or roll.
A cone.
The interception of a plane with a cone parallel to the base of the cone is a circle.
A 2d cone is called a Light Cone. <edit: Isn't it called a circle sector?>
Yes. A cone will roll following a circular path with the central axis being the point of intersection of the sides of the cone (which is the point of a pointed cone).
both
No.
you are a cone
Cone
a cone
I think both
A cone.
A cone?
A cone.
A cone
first you make a small pizza and roll it up. then finally put it in a cone.