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A sphere is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball Like a ...


Animated demonstration of the sphere suurface area calculation.


The Greek mathematician Archimedes discovered that the surface area of a sphere is the same as the lateral surface area of a cylinder having the same radius ...


To prove that the surface area of a sphere of radius r is 4πr2, one straightforward method we can use is calculus. We first have to realize that for a curve ...


From the Fun Fact files, here is a Fun Fact at the Medium level: Surface Area of a Sphere. The area of a disk enclosed by a circle of radius R is Pi*R2.


NOTE: The value of p can never be known exactly, so surface areas of spheres cannot be calculated exactly. Common approximations for p are: 3.14, and 22/7.


Math2.org Math Tables: Areas, Volumes, Surface Areas ... Areas. square = a2. rectangle = ab. parallelogram = bh. trapezoid = h/2 (b1 + b2) ... sphere = (4/3) [pi]  ...


Surface Area of a Sphere = 4 pi r 2. (r is radius of circle)


A sphere is a body bounded by a surface whose every point is equidistant (i.e. the same distance) from a fixed point, called the centre. For example, a shot (a ...