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CALCULATOR FOR CIRCLE RADIUS, CIRCLE CIRCUMFERENCE, CIRCLE AREA, SPHERE AREA, SPHERE VOLUME, CYLINDER AREA AND CYLINDER VOLUME ... Click Here To See Circle, Sphere and Cylinder Formulas Scroll Down For Cylinder Calculator; CIRCLE & SPHERE Calculator Input >>> Is This Number;
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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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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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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: ... Also, if the surface area of the sphere is known, then the radius can be calculated like this:
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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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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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We get the integral from 0 to infinity of Vr^(N - 1)e^(-r^2) , where V is the surface volume of a sphere. Integrate by parts repeatedly to get the desired formula. It is possible to derive the volume of the sphere from ``first principles''.
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www.faqs.org/faqs/sci-math-faq/surfaceSphere/
www.faqs.org/faqs/sci-math-faq/surfaceSphere/
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A thread from the Geometry Forum newsgroup archive ... Proof of formula for surface area for sphere by Thomas Foregger on 09/12/95. ... Re: Proof of surface area of a sphere formula by Thomas Foregger on 09/13/95.
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forum.swarthmore.edu/~sarah/HTMLthreads/articletocs/pro...
forum.swarthmore.edu/~sarah/HTMLthreads/articletocs/proof.surface.ar.sphere.html
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