why is the surface area of hemisphere equal to 3pie radius squared
Actually, it is not.
The surface area of a sphere is 4πr^2, so the area of a hemisphere is 2πr^2.
As to why, you can google the topic and find various ways to derive the formula.
The surface area of a sphere is 4πr^2, so the area of a hemisphere is 2πr^2.
As to why, you can google the topic and find various ways to derive the formula.