Octahedron.
dimensional proportion
It is a 3 dimensional shaped object
A two-dimensional object is an object that can be drawn on a flat sheet of paper. It's called "two-dimensional" because it has 2 dimensions . . . length and width, but no height.
A polygon is a plane (2-dimensional) object bounded by straight lines. A polyhedron (not polyhendron!) is a solid (3-dimensional) object bounded by polygonal faces. So, pyramids and some prisms are polyhedra. A cylinder is a type of prism but, because two of its faces are circular, those faces are not polygons. As a result a cylinder is not a polyhedron.
'Object' Do you mean 'shape' or 'solid'. a 2-dimensional shape is an hexagon a 3-dimensional solid is a hexahedron.
Some triangular pyramids fit this description. They are called regular tetrahedrons.
A three-dimensional object is called a solid.
For a plain 2-dimensional figure it is an OCTAGON. For a 3-dimensional object it is an OCTAHEDRON.
For the word' object' , do you mean a 2-dimensional shape, or a 3-dimensional solid. 2-dimensional ; is a nonagon 3-dimensional ; is a nonahedron.
A pentagon is a 2 dimensional object. The 3 dimensional object, with 12 pentagonal faces, is called a dodecahedron.
The term for the path of an object through 4-dimensional spacetime is called its "worldline."
Sphere !
dimensional proportion
It is a 3 dimensional shaped object
A two-dimensional object is an object that can be drawn on a flat sheet of paper. It's called "two-dimensional" because it has 2 dimensions . . . length and width, but no height.
An object in 3-dimensional space is called a three-dimensional object or a 3D object. These objects have length, width, and height, making them appear solid and taking up space in all directions.
A polygon is a plane (2-dimensional) object bounded by straight lines. A polyhedron (not polyhendron!) is a solid (3-dimensional) object bounded by polygonal faces. So, pyramids and some prisms are polyhedra. A cylinder is a type of prism but, because two of its faces are circular, those faces are not polygons. As a result a cylinder is not a polyhedron.