A cylinder.
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A 2d shape is a flat object (ex: square, circle, etc.) and a 3d shape is a shape in space (ex: cube, sphere, etc.)
A 3D star is not a standard shape. You can easily add another point.
Adding depth makes a 3D object from a 2D shape.
The edge of a 3D shape is called an "edge." It is the line segment where two faces of the shape meet. In geometric terms, an edge is one of the fundamental components that define the structure of polyhedra and other solid figures.
A geometric figure is a shape like a square or rectangle and it can be used in different views like 3D, 2D and 1D would be just a line. So there is your answer!