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There is NO equation for the area of a sphere

Assuming you mean surface area, the surface area of a sphere of radius r is 4πr^2.

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โˆ™ 2013-04-16 21:33:37
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A polynomial of degree zero is a constant term

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Q: Formula for area of a sphere?
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What is the formula to find the suface area of a sphere?

Surface area of a sphere = 4 x (pi) x (radius)2


What is the surface area of a sphere with a radius of 5 cm?

The surface area is about 314.16 cm2The formula for the surface area of a sphere is 4 (pi) r2For a radius of 5 cm, the surface area is4 (3.1416) (5)2 = 4 (3.1416)(25) = about 314.16 cm2*Do not confuse the sphere's surface area formula SA = 4 (pi) r2 withthe formula for the volume of the sphere, which is V = 4/3 (pi) r3


How do you determine the surface area of a partial sphere?

Take the surface area of the sphere as of it was whole, and divide by the amount of the sphere that is missing.


How many surface does a sphere have?

Surface area of a sphere is: 4 pi r2, where r=radius.


Why is the volume of a sphere divided by 3?

( The volume of a sphere is (4/3)(pi)r3 ). The short answer: because of calculus. The long answer: This can be seen by using calculus to derive the volume of a sphere from the formula from it's surface area. To do this, we imagine that the sphere is full of infinity thin spheres inside it (all centered at the big sphere's center), and add up the surface areas of all the spheres inside. The formula for the surface area of a sphere is 4(pi)r2. Let's call R the radius of the big sphere we want to find the volume of. To find the volume of this sphere, we add up the surface areas of all the spheres whose radii range from 0 to R. This gives the following formula (where r is the radius of each little sphere): 0R∫ 4(pi)r2dr The 4 and pi can be factored out giving: 4(pi) (0R∫r2dr) Integrating gives: 4(pi) [r3/3]0R This is where the three comes from. Finishing the evaluation of the integral gives: 4(pi)(R3/3 - 03/3) = 4(pi)(R3/3) Which can be rewritten as (4/3)pi(R3) which is the formula for the volume of a sphere.

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