A cylinder is a 3-dimensional figure with two circular bases and a curved face.

The surface area of a cylinder the sum of the areas of its two bases and its curved face.

To conceptualize **surface area of cylinders**, we can imagine that the lateral area of a cylinder can be "unrolled" into a rectangle with one side equaling the circumference of the circle and the other side equal to the height of the cylinder (unless it is oblique).

It is pretty easy to calculate their areas and then add them up.

SA_{cylinder}=