Question

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Answer 1

Answer:

area of hemisphere = half surface area of sphere + area of the base of the hemisphere

so, area of hemisphere = 2πr^2+πr^2 =3πr^2

Answer 2

Answer:

The surface area of a sphere of radius r is 4πr2

. Half of this is 2πr2

If you have a hemispherical object then it has a base which is a circle of radius r.

The area of a circle of radius r is πr2

and thus if the hemisphere is meant to include the base then the surface area is 2πr2+πr2

=3πr2 .

Step-by-step explanation:

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