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Because 4*pi*radius2 is surface area of a sphere

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Q: Why is 4 pi r squared the surface area?
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Related questions

What is 4 times pi times the radius squared is the surface area of a sphere?

That is correct because the surface area of a sphere is: 4*pi*radius squared


What is the surface area of a cylinder with 4m in diameter and 6m in height?

The surface area of a (closed) cylinder equals the surface area of both bases (the top and bottom), i.e. pi x radius squared (first base) + pi x radius squared (second base), plus the lateral surface area (the surface area of the curved side), i.e. circumference (pi x diameter) x height. Inserting the numbers: SA = pi x (2 m.) squared + pi x (2 m.) squared + pi x 4 m. x 6 m. = pi x 4 m. squared + pi x 4 m. squared + pi x 24 m. squared = 8 x pi m. squared + 24 x pi m. squared = 32 x pi meters squared.


What is the surface area of a soft ball?

Surface area of a ball or a sphere = 4*pi*radius squared


What can you use to find the sphere surface area?

Surface area of a sphere = 4*pi*radius squared


What is the surface area of the sphere with length of 16 units?

Surface area of a sphere = 4*pi*radius squared


What is the surface area of a sphere with 12 units in length?

Surface area of a sphere is: 4*pi*radius squared


What is the curved surface if sphere when radius is 0.21?

Surface area = 4*pi*radius squared


Does a sphere have surface area?

Yes and its formula is: 4*pi*radius squared


What is the total surface area of a sphere in terms of its diameter?

Surface area of a sphere = 4*pi*(diameter/2)^squared


Solid whose surface area is 4pie times the area squared?

The surface area of the 'sphere' is four times the area of a 'great circle',or (4 pi) times the RADIUS squared.


What is 4 pi r squared?

It is the formula for finding the surface area of a sphere which is 4*pi*radius2


What is the surface of area of a sphere with a diameter of 4 in?

Surface area of the sphere: 4*pi*2 squared = 50.265 square inches to 3 decimal places