The shape is in 3d and looks like a hexagon looking at it normally you would say it has 2 sides but if you do a certain flexing/folding of it on of the sides disappear and a new one appears it can be made out of paper in real life

A face is one of the polygonal surfaces of a polyhedron.

This rectangular prism has six faces. We can see three of them (blue, purple, and green); the other three are hidden from view. This polyhedron has eight faces. We can see five of them -- four rectangles (of which the blue, purple, and red ones appear to be square), and a green L-shaped six-sided figure (hexagon). The other three faces -- the bottom rectangle, the tall right-side rectangle, and the back L-shape -- can't be seen.