A right circular cylinder is a solid generated by the revolution of a rectangle about one of its side. A right circular cylinder has two plane ends. Each plane end is circular in shape and the two plane ends are parallel. Each of these two ends is called the base of the cylinder. The line segment joining the centers of two circular ends is called the axis of the cylinder. The axis is always perpendicular to the bases of a right circular cylinder. The length of the axis of the cylinder is called its height and the radius of the circular bases is known as its radius. The curved surface joining the two bases of a right circular cylinder is called its lateral surface.
For a right circular cylinder of radius r and height h. we have:-
(i) Area of each end or base area = Πr²
(ii) Curved (lateral) surface area = 2Πrh
(iii) Total surface area = 2Πrh +2Πr²
(iv) Volume = Πr²h
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