3 dimensional shapes

Question

What about them? Do you need examples? A sphere is one. You can think of others.

3D shapes are figures that pop out. Like for example, if you saw an airplane fly by your're seeing it in 3D. But if you see an airplane on a piece of paper drawn by a third grader it is not 3D because it doesn't look real, it's just on paper.

a sphere is a 3D shape so is a triangular prism and so forth.

a sphere is a 3D shape so is a triangular prism and so forth.

sum the polynomials 2x^2-3x-4,2x-5 and 3x^3+2x^2-6

Dodecahedron