In a virtual 3D environment a cylinder can have as many sides as it take for it to look convincing. Though for optimization purposes the fewer the better.
A cylinder has two sides - an inside and an outside
A cylinder has three sides and no corners.
Cylinder shapes only have three sides.
About 26 sides, and 24 corners.
6
seven
6
cylinder
There are 2 completely flat sides on every cylinder.
There are 14 faces.
14
12 (a dodecahedron)