There are 5 flat surfaces.
2 flat and 1 curved
2
Six.A cube has 6 faces, so it would have 6 flat surfaces
Two. The ends.
A tetrahedron is a triangular based pyramid that has 4 faces, 6 edges and 4 vertices.
None
5 flat surfaces.
There are 5 flat surfaces.
2 flat and 1 curved
A cuboid has 6 sides/faces/flat surfaces.
5
A cube has 6 faces, so it would have 6 flat surfaces
cube There are a great many solid shapes that have only flat surfaces.
It has 6 flat surfaces.
2 flat surfaces unless it is rolled up in which case it has 2 curved surfaces.
A cylinder has 2 flat surfaces.