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How do you find the surface area of a hemisphere with these measurements-

Radius-2.5cm

Diameter-5cm

 Jul 7, 2021
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A hemisphere is basically half of a sphere. The regular formula for the SA of a sphere is \(4\pi r^2\), but *1/2 so the surface area of the hemisphere is \(2\pi r^2\). Plugging in 2.5, 

\(2\pi \cdot2.5^2 \\ 2\pi \cdot 6.25 \\ 12.5\pi\)

So $12.5\pi$ is the surface area

 Jul 7, 2021

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