Here are the answers to your questions:
Question 1
The horizontal cross section of a wedge of cheese has 3 sides.
Question 2
The vertical cross section is the shape of Option #2 (triangle).
Question 3
The vertical cross section of a household battery has 2 sides.
Question 4
Option #4 (cone).
Question 5
The rotation of a domino around one of its shorter edges forms a three-dimensional object that is a cylinder (Option #5).