You must know that a hemisphere is a half of a sphere. Below are
the formulas to find the curved surface area of a hemisphere
(without the base circle area) and the total surface area of a
hemisphere (with the base circle area). Curved Surface Area of
Hemisphere: You must know that the surface area of a sphere is
4πr². A hemisphere is half of a sphere, this must mean that the
curved surface area of a hemisphere is 2 divide by the surface
area of a sphere. That is; 4πr²/2 which gives the following
expression. Total Surface Area of Hemisphere If you’re to take
into consideration the base circle below the curve meaning the
total surface area. The surface area would be a combination of
the above area and the area of the circle. As simple as that!.
The area of the circle is πr². This means the total surface area
is 2πr² + πr². If we simplify this gives 3πr² as expressed
below. Remember there is a difference between the curved surface
area and the total surface area. The total surface area includes
the base circle