Using the formula for the surface area of a sphere, which is SA = 4 (pi) r2, you
can find the radius, and the diameter of the sphere is twice the radius.
Example:
If the surface of a sphere is 380 square cm
4 (pi) r2 = SA
4 (3.1416) r2 = 380
12.5664 r2 = 380
r2 = approx. 30.24
r = 5.5 and diameter D = 11 cm
The surface area of a sphere with diameter 78 and using 3.14 for Pi is about 19,103.76 units2
Yes, that's true. The surface area is (the square of the diameter) multiplied by (pi).
Surface area of a sphere in square units = 4*pi*radius^2
Surface area of a sphere = 4*pi*radius2
Surface area of a sphere = 4*pi*radius squared
The surface area of a sphere with diameter 78 and using 3.14 for Pi is about 19,103.76 units2
Yes, that's true. The surface area is (the square of the diameter) multiplied by (pi).
Surface area of a sphere in square units = 4*pi*radius^2
Surface area of a sphere = 4*pi*radius2
Oh, dude, you just need to find the radius first, which is half of the diameter, so that's 9 cm. Then you use the formula for the surface area of a sphere, which is 4πr^2. Plug in 9 for r, square it, multiply by 4, and then multiply by π. That gives you a surface area of 1017π square cm, or about 3190 square cm. Easy peasy!
Surface area of a sphere = 4*pi*radius squared
-- You have to ask somebody for the radius of the sphere, in meters. If they tell you the diameter instead, then the radius is 1/2 of the diameter, in meters. -- Multiply (4) times (pi) times (the radius)2 . That's the surface area of the sphere, in square meters. -- Round the answer to the nearest square meter.
4*pi*radius2 = area radius = square root of (area/4*pi) diameter = 2*radius volume = 4/3*pi*radius3
The surface area of a sphere is equal to 4 x Pi x radius2
The surface area is 1,385.4 cm2
Surface area = 4*Pi*radius2
The surface area of every sphere is (4 pi) times (the radius squared).Knowing that, you can find the surface area of not only the one you'reasking about right now, but of every sphere that ever was, is, or will be !