2d shapes are circles, ellipses, polygons (triangles, quadrilaterals, pentagons, etc.), angles, other non polygon shapes (like when you draw a star and the lines cross over each other.
3d shapes are shapes with added depth, such as tetrahedron, pyramid, prism (such as a cube), sphere (a ball), cone, etc.
A camera is a 3D shape. A photograph is a 2D projection of a 3D shape onto 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'.
A television set is a 3D shape. The image (picture) on the television screen is a 2D shape. 3D is when it has length, width, and height. 2D is only length and width.
It's a 2D shape.
A piece of paper is 3D.
2d
2D.
a pyramid is a 3D shape :)
It's a 2D shape.
Paper is a 3D object.
3D
A nonagon is a 2D shape and there is not a 3D equivalent shape.