Curved surface area of hemisphere of radius " r " is equal to

Concept: Hemisphere is formed when a sphere is divided into two equal parts.

Then, the curved surface area of a hemisphere $=\frac{\text{ Surface area of a sphere }}{2}$

$\Rightarrow \frac{4\pi r^2}{2}$

$\Rightarrow 2\pi r^2$

Hence, the curved surface area of a hemisphere of radius " r " is equal to $2\pi r^2$.