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Mensuration> Surface Area of Sphere ... Archimedes, a Greek mathematician, found out that the surface area of a sphere is the same as the curved surface area of a cylinder having the same diameter as the sphere and a height same length as the diameter.
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library.thinkquest.org/C0110248/geometry/menareasphere....
library.thinkquest.org/C0110248/geometry/menareasphere.htm
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The volume V is 4/3¶3. Substituting, 4/3¶r3 = 1/3r * S.A. To solve for the surface area, multiply both sides by 3/r. 3/r * 4/3¶r3 = 3/r * 1/3r * S.A. 4¶r2 = S.A. Sphere Surface Area Formula: The surface area SA of a sphere with radius r is 4¶r2. S.A. = 4¶r...
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library.thinkquest.org/12006/S-M-3.shtml
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The surface area of a sphere of radius 'r' is given by: ... Example 1 if 'r' = 5 for a given sphere, and p = 3.14, then the surface area of the sphere is: ... File name: 'Surface area of sphere.mhp' File size: 9kb; Click here to download the file.
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www.teacherschoice.com.au/Maths_Library/Area%20and%20SA...
www.teacherschoice.com.au/Maths_Library/Area%20and%20SA/area_2.htm
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Subject: Surface area of a sphere ... How can I demonstrate to my middle school students the reason for the formula for the surface area of a sphere? ... Now, it is NOT an accident that the cylinder surface is EXACTLY the area of the sphere.
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mathcentral.uregina.ca/QQ/database/QQ.09.99/wilkie1.htm...
mathcentral.uregina.ca/QQ/database/QQ.09.99/wilkie1.html
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In this hands-on Explorer lesson students learn the derivation of the surface area formula for a sphere. ... Here is a concrete way to show students why the surface area of a sphere is derived from the formula 4 pi x r2.
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mathforum.org/paths/measurement/aos.html
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Formulas for Circle Circumference, Circle Area, Sphere Area, Partially Filled Sphere Area, Partially Filled Sphere Volume, Sphere Volume, Cylinder Area, Cylinder Volume ... ; Click here or here for partially-filled sphere calculators. ... RETURN TO CIRCLE SPHERE CYLINDER CALCULATOR...
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www.1728.com/diamform.htm
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Similarly, the volume of a ball enclosed by a sphere of radius R is (4/3)*Pi*R3. And the formula for the surface area of a sphere of radius R is 4*Pi*R2. And, you can check that the latter is the derivative of the former with respect to R.
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www.math.hmc.edu/funfacts/ffiles/20004.2-3.shtml
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Sphere - Wikipedia, the free encyclopedia
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A sphere (from Greek σφαίρα — sphaira , "globe, ball,") is a perfectly round geometrical object in three-dimensional space, such as the shape of a round ball. Like a circle in two dimensions, a ...
en.wikipedia.org/wiki/Sphere
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