its called an egg, the only thing that's changed is the shape of you egg shaped head you strange person
A 3 dimensional circle fits the description of a sphere
a prism.
A paper plate can be one if you flatten it. A sturdy plate is 3-dimentional. A place plate is also 3-dimentional.
It would most commonly be called a box. Properly, it is called a rectangular prism. It is also a right-angled parallelepiped.
A three-dimensional object is called a solid.
They are polyhedra.
a 3 dimentional one
A polyhedran is a 3-dimentional figure that has sides that are polygons. A polygon is a 2-dimentional figure with straight sides, a closed side.
If it is a 2 dimentional shape it is called an 'octadecagon'
A 3-D circle is a "sphere" (a ball shape).
Pentagonal-Based Pyramid
An enneadecagon (or enneakaidecagon or nonadecagon).