PROVE THAT TSA OF HEMISPHERE IS 3 PIE r(SQUARE)

Dear Student,

Knowing that the curved surface area of a sphere is 4Πr²,

The curved surface area of a hemisphere will be half of that of a full sphere, which is, 2Πr².

But this is only when the cross sectional face of the hemisphere is not considered, whose area is simply the area of a circle with radius r, which is, Πr².

Hence the total curved surface area of a hemisphere is 2Πr² + Πr² = 3Πr².

Regards Topperlearning.