How to find the surface area of a hemisphere with a diameter of 643 inches
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How to find the surface area of a hemisphere with a diameter of 643 inches

[From: ] [author: ] [Date: 12-06-17] [Hit: ]
A = pi*r^2.So the total is now A = 3pi*r^2.Now plug in r, which you know because you know the diameter.......
Can you show me the whole solution ?

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Start by writing down the formula for surface area of a sphere: A = 4pi*r^2.

A hemisphere is half a sphere, so take half of that. A = 2pi * r^2.
Are you supposed to include the flat side? That's a circle with the same radius, A = pi*r^2.

So the total is now A = 3pi*r^2.

Now plug in r, which you know because you know the diameter.
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