Question

How do I find the surface area of the hemisphere in terms of pi??

Answer 1

Formula of surface area (SA) of an hemisphere:

$SA=2\pi r^2$

where r represents the radius of the hemisphere.

In the image, we are given the radius, r = 8 cm. Then, we just have ot replace this value in the formula and solve:

$SA=2\pi(8)^2$

Simplifying:

$SA=2\pi\cdot(64)$$SA=128\pi$

Answer: 120π cm²