Being a two dimensional figure, the arguments that a trapezoid has concurrently one and two sides can be equally defended.
5 flat surfaces.
Flat surfaces: 6Curved surfaces: 0.
There are 5 flat surfaces.
It has 6 faces which are its flat surfaces.
There are 2 flat surfaces, both are circles.
5 Flat surfaces 4 flat surfaces (3 for the sides and 1 for the base).
A square has 4 flat surfaces.
A cuboid has got six flat surfaces.
A cuboid has 6 sides/faces/flat surfaces.
2 flat and 1 curved
A cylinder has 2 opposite parallel flat surfaces.
5