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To do this question, we have to ask ourself, what formula do you use to find the surface area of a sphere.

The answer should be known to you, but it is 4πr2.

Since we know how to find the surface area for a full sphere, then finding the surface for a half sphere is just half the job.

You use the formula for the full sphere 4πr2, and divide it by 2... so (4πr2) / 2 .

Voila!

Q: How do you figure out surface area for half sphere?

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The surface area of a semicircle has the round surface which is half a sphere and also has the flat surface which is a circle.

Surface area of half a sphere = 2*pi*radius2 Surface area = 200*pi = 628.3185307 square units.

Find the surface area of the full sphere [ A = 4 pi R2 ] and then take half of it. You wind up with [ 2 pi R2 ] for the outside surface area of a half sphere, or [ 4 pi R2 ] for the (inside + outside) surface area of the half sphere. (Since the inside and outside are now both exposed to the weather, you probably want to paint both surfaces.)

100.48

The surface area of a sphere is 4(3.14)R2where R is the radius of the sphere so the surface area of your dome is half of that. 2(314)R2

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The surface area of a semicircle has the round surface which is half a sphere and also has the flat surface which is a circle.

Surface area of half a sphere = 2*pi*radius2 Surface area = 200*pi = 628.3185307 square units.

Find the surface area of the full sphere [ A = 4 pi R2 ] and then take half of it. You wind up with [ 2 pi R2 ] for the outside surface area of a half sphere, or [ 4 pi R2 ] for the (inside + outside) surface area of the half sphere. (Since the inside and outside are now both exposed to the weather, you probably want to paint both surfaces.)

100.48

The surface area of a sphere is 4(3.14)R2where R is the radius of the sphere so the surface area of your dome is half of that. 2(314)R2

To find the surface area of a hemisphere, you can use the formula: SA = 2πr^2, where r is the radius of the hemisphere. This formula takes into account the curved surface area of the hemisphere.

1500pi

Surface area of a sphere (a rounded ball) = 4*pi*radius2 Surface area of half a sphere = 2*pi*radius2

The half of the Earth's surface that is north of the equator is called the Northern Hemisphere, while the half south of the equator is the Southern Hemisphere.

It is: 2*pi*radius2 square units

Tricky. You need to flatten out the surface to work it out. Depends on the shape - if it's like a hemisphere then you can use the properties of a sphere - volume = 4/3 Pi R3 and surface area = 4 Pi R2 so if your dome is like half a sphere then its surface area = 2 Pi R2 and you can measure the radius R so can work it out!

picture a sphere. the surface area of a sphere is 4*pi*r^2.now, cut it in half. the surface area is 4*pi*r^2 / 2 =2*pi*r^2this is without including the bottom circular base