Question

tsa of hemisphere of radius r is ________​

Answer 1

Answer:

tsa of hemisphere of radius r= 3*π*r*r

Step-by-step explanation:

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Answer 2

$\huge{\dag} \: {\underline{\sf{\purple{\mathbf{ Answer }}}}}$

$☞︎︎︎ \: \: \: \huge \mathsf{3\pi{r}^{2} }$

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.