There's no difference. They're the same thing.
None
take, for an example, a duck. This is a 3d shape because it has three dimensions. Compare this to a square, which is 2d. the difference is that the duck has a beak, and the square does not.
The difference between 2d and 3d shapes is that, a 2d shape is flat, has no volume and depth and cannot be handled while a 3d shape can be held, has depth, volume and can hold things inside it. These are the dimensional shapes which are mostly used in geometry.
A 2d shape is a flat object (ex: square, circle, etc.) and a 3d shape is a shape in space (ex: cube, sphere, etc.)
Yes because a triangle is a 2D shape whereas a triangle prism is a 3D shape
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2D shape
A net is a 2D representation of a 3D shape
1d has only the length, but 2d has both the length and width.
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A rhombus is a 2D shape.
A 'Quadrilateral' is a 2-dimensional, 4 sided polygon. The following names are quadriltaerals;- square, rectangle, rhombus, trapezium, parallelogram, kite, and an irrelgular qudarilateral. NB In 3-dimensional space, ther equivlanet is a 'CUBOID'.