A cylinder is a long round object with flat circular ends.
A disc.
Discus
A round object with flat, circular ends is a cylinder. It is shaped like a can of vegetables.
A flat round object is a circle. Surface area of a circle = pi*radius squared.
The object described is a cylinder, specifically a right circular cylinder. It is a round solid with flat circular ends.
projection map
A cylinder
projection map (:
a projection map
a mercator map
a projection map
B/c maps are flat, andthe Earth is round. You can't make a perfect image of a round object on a flat surface.
Two. Considering this is a two-dimensional object, cut out of a piece of paper it would have two flat surfaces, the front and the back. If your talking a about a sphere, the three-dimensional object of a circle, it has no flat surfaces considering it is round.
The world is round, and maps are flat. It is difficult to accurately display a round object on a flat piece of paper.