Oh, dude, it's like those flat paper things that you can fold into those cool origami shapes. They're called nets, which sounds way cooler than it actually is. So yeah, you take a net, fold it up like a pro, and bam, you've got yourself a 3D object.
net
SQUARE
A three dimensional object
A net for the 3D shape.
A net is a two-dimensional pattern that you can fold to form a three-dimensional figure.
A pattern that can be folded to form a three-dimensional figure is known as a net. For example, a net for a cube consists of six square faces arranged in a way that allows them to be folded up to create the cube. Each face is connected by edges, and when folded along these edges, the flat pattern transforms into the three-dimensional shape. Other examples include nets for pyramids, prisms, and other polyhedra.
Two dimensional object is a plane figure where as three dimensional object is solid (space) figure.
Area is a two-dimensional measurement. It tells you how big a two dimensional object is or how large the surface of a three-dimensional object is.Volume is a three dimensional measurement. It tells you how big the inside of a three-dimensional object is or how much a three-dimensional object can hold inside.
net
SQUARE
A square
A proportional model of a three dimensional object is an scale model.
NET
A three dimensional object
A net for the 3D shape.
it is called a net
A three-dimensional object is called a solid.