Talk:Surface area
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Two dimensions
[edit]Is it really correct that two dimensional structures such as triangles have "surface area" ? I do not think so, "surface area" is a three dimensional concept. Ar
- I've moved the table of areas of plane figures to the talk page of "Area". Arcfrk (talk) 08:48, 11 March 2008 (UTC)
Surface Area To Volume Ratios
[edit]There is a problem with the last section. It states that if you increase the radius the ratio decreases. However, if you change the units of measure, the ratio can increase with a larger radius. A radius of 100 meters has a SA:V ratio of .03, but a radius of 1 kilometer has a ratio of 3. Also, it should be clear that this is assuming cells have a spherical shape. —Preceding unsigned comment added by 70.188.231.137 (talk) 04:05, 30 March 2008 (UTC)
- SA:V is measured in inverse distance units. It is not dimensionless. A sphere with a radius of 100 meters has a ratio of 0.03/meter while the sphere with a radius of 1 kilometer has a ratio of 3/kilometer = 3/(1000 meters) = 0.003/meter. Measuring in the same units, the sphere ten times larger has a ten times smaller ratio, as it should. This similarity law holds for any shape, not just spheres. In the case of cells the only assumption is that a big cell is the same shape as a little one. This is more or less true of cells. It is definitely not true of multicellular structures, which is why one can easily distinguish a mouse bone from an elephant bone even when the mouse bone is magnified to elephantine size. -Dmh (talk) 05:32, 23
And I am SMART —Preceding unsigned comment added by 66.112.37.98 (talk) 22:33, 2 March 2011 (UTC)
What. The. Hell.
[edit]I came here to verify a formula, but I ended up stumbling upon a page a 4th grader could have written. What in the world happened to this article?
S lijin (talk) 01:54, 19 May 2009 (UTC)
- I came here to verify a formula, but I ended up stumbling upon a page a professor could have written. What in the world happened to this article? i can not understand any of this, perhaps someone could submit something eaiser to understand Summer911 (talk) 05:32, 10 March 2010 (UTC)
Moved from the article
[edit]Shape | Area formula derivation |
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Sphere | The surface area of a sphere is the integral of infinitesimal circular rings of width
References recovered partially[edit]http://web.archive.org/web/20120427201949/http://www.math.usma.edu/people/rickey/hm/CalcNotes/schwarz-paradox.pdf — Preceding unsigned comment added by 94.197.120.122 (talk) 22:10, 9 October 2013 (UTC)
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Cheers.—InternetArchiveBot (Report bug) 18:22, 26 July 2017 (UTC) Should "Surface Measure" redirect here?[edit]The technical term "surface measure" doesn't have a wikipedia page. Is this the page? Should a redirect come here? Characterization[edit]The article mentions a characterization of surface area using a few properties such as additivity and invariance under Euclidean motions. There should be given a source for this, and preferably it should also be explained more clearly. MathHisSci (talk) 21:52, 14 April 2023 (UTC) |