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

Asked by IOUHIU OYYFGY | 26th Nov, 2010, 06:28: PM

Expert Answer:

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.

Answered by  | 27th Nov, 2010, 10:28: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.