1, the concept is different. Plane graphics are graphics that exist on a plane, and three-dimensional graphics are composed of one or more planes and can exist in real life.

2. Different physical characteristics. A plane figure has only one surface, while a three-dimensional figure consists of multiple surfaces, including an upper surface, a left surface, a side surface and a lower surface.

3. The observation angle is different. Plane graphics can only be viewed from one angle, while three-dimensional graphics are viewed from two, three or even more angles.

Extended data 1, cube

There are 8 vertices and 6 faces. Each face has the same area (or each face is made up of squares). There are 12 sides, and each side is equal in length. Cube is a special kind of cuboid.

2. Cuboid

There are 8 vertices and 6 faces. Each face consists of a rectangle or a set of opposite squares. There are 12 sides, and the four opposite sides are equal in length.

Step 3: Cylinder

The upper and lower surfaces are circles of the same size. There is a face called a side. The edge is rectangular or square after height expansion, parallelogram along a straight line, and irregular figure when it is expanded at will. There are countless kinds of heights, all of which are of equal length.

Baidu Encyclopedia-Plane Graphics

Baidu Encyclopedia-Stereograph