Actually a box has 6 sides.
Kid trying to be "smart" to the teacher.
Depends on the shape of the box.
A cube has 6 sides. A box's sides are dependent on the shape of the box.
And so, God came forth and proclaimed widescreen is the best.
Sony 16:9
What box has anything other than six sides?
sharea circular box?
shareA cylindrical box (3)
A pyramidal box (4)
A pentagonal box (7)
A hexagonal box (8)
A septagonal box (9)
...etc
Only a cube has 6 sides, but boxes can be just about any geometrical shape that you want it to be. Also if you're a fan of Kurt Cobain/Nirvana there's a heart-shaped box, which is 4 sides as well.