Surface area of sphere is :
A= 4*pie*r^2
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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.
Take the surface area of the sphere as of it was whole, and divide by the amount of the sphere that is missing.
Surface area of a sphere: A = 4πr2So, surface area = 4pi52
Surface area of a sphere = 4*pi*radius2
The sphere's surface area is ~1,017.9 square units.