Editing Talk:2322: ISO Paper Size Golden Spiral
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It annoys me that the hover text says 11/8.5 = pi/4, when 8.5/11≈0.77272727272 and pi/4≈0.78539816339. Claiming 8.5/11 equals pi/4 would be a much more beleiveable lie. [[Special:Contributions/162.158.79.37|162.158.79.37]] 15:29, 19 June 2020 (UTC) | It annoys me that the hover text says 11/8.5 = pi/4, when 8.5/11≈0.77272727272 and pi/4≈0.78539816339. Claiming 8.5/11 equals pi/4 would be a much more beleiveable lie. [[Special:Contributions/162.158.79.37|162.158.79.37]] 15:29, 19 June 2020 (UTC) | ||
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The explanation says that the A series "side lengths shrink by a factor of the square root of two" but that's not true. The width of A(n+1) is half the length of A(n) as depicted. The sqrt(2) ratio referenced is between the length and width of any one piece of paper.[[Special:Contributions/172.69.62.124|172.69.62.124]] 15:35, 19 June 2020 (UTC) | The explanation says that the A series "side lengths shrink by a factor of the square root of two" but that's not true. The width of A(n+1) is half the length of A(n) as depicted. The sqrt(2) ratio referenced is between the length and width of any one piece of paper.[[Special:Contributions/172.69.62.124|172.69.62.124]] 15:35, 19 June 2020 (UTC) | ||
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Hi ! How come 11/8.5 = Pi/4 ? First one is more thant 1, second one is less than one... Although Pi/4 and 8.5/11 (or the reverse) are pretty similar, as usual in "let's annoy mathematicians" Randall's style... | Hi ! How come 11/8.5 = Pi/4 ? First one is more thant 1, second one is less than one... Although Pi/4 and 8.5/11 (or the reverse) are pretty similar, as usual in "let's annoy mathematicians" Randall's style... | ||
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https://xkcd.com/spiral/ --[[Special:Contributions/188.114.103.233|188.114.103.233]] 17:22, 19 June 2020 (UTC) | https://xkcd.com/spiral/ --[[Special:Contributions/188.114.103.233|188.114.103.233]] 17:22, 19 June 2020 (UTC) | ||
I understand why it annoys mathematicians (it's not the golden ratio), but why does it annoy graphics designers? Please add explanation! | I understand why it annoys mathematicians (it's not the golden ratio), but why does it annoy graphics designers? Please add explanation! | ||
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It should be noted that the logarithmic spiral this comic implies it is would actually go outside the bounds of the paper. The leftmost point of the spiral would be about 6.4mm to the left of the left edge of the A1 sheet. [[User:Zmatt|Zmatt]] ([[User talk:Zmatt|talk]]) 18:39, 19 June 2020 (UTC) | It should be noted that the logarithmic spiral this comic implies it is would actually go outside the bounds of the paper. The leftmost point of the spiral would be about 6.4mm to the left of the left edge of the A1 sheet. [[User:Zmatt|Zmatt]] ([[User talk:Zmatt|talk]]) 18:39, 19 June 2020 (UTC) | ||
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Mathematicians get annoyed by the claim that the golden ratio is everywhere. I love Disney's "Donald in Mathmagic Land" but they make some outrageous claims about the golden ratio's place in art and architecture. BTW, the ISO system of paper sizes is awesome! You can photocopy two A4 pages side-by-side, reduced to fit exactly on a single A4 page. | Mathematicians get annoyed by the claim that the golden ratio is everywhere. I love Disney's "Donald in Mathmagic Land" but they make some outrageous claims about the golden ratio's place in art and architecture. BTW, the ISO system of paper sizes is awesome! You can photocopy two A4 pages side-by-side, reduced to fit exactly on a single A4 page. | ||
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Isn't grade closer to degrees than to radians? [[User:Djbrasier|Djbrasier]] ([[User talk:Djbrasier|talk]]) 15:03, 20 June 2020 (UTC) | Isn't grade closer to degrees than to radians? [[User:Djbrasier|Djbrasier]] ([[User talk:Djbrasier|talk]]) 15:03, 20 June 2020 (UTC) | ||
− | :It's two different things. The "[ | + | :It's two different things. The "[[w:Grade (slope)|grade]]" of a slope is just the rise divided by the run, commonly expressed as a precentage. It is not an angle measure but the tangent of an angle measure. It is commonly used in North America for surveying and engineering purposes. "[[W:Gradian]]" is a badly named angle measurement that, worse, is ofter referred to informally as "grade" from "centigrade".It is an angle measure, though a useless one: ten-ninths of the measure in degrees. The gradian is commonly used for surveying and engineering in some parts of Europe. The text in the current explanation confuses them, which is common due to the bad naming of the second measure. [[Special:Contributions/162.158.187.197|162.158.187.197]] 16:45, 20 June 2020 (UTC) |
A friend of mine, attempting to do graphic design, once created an approximate golden spiral using the boxes diagram with quarter circles. He then laboriously produced a logo by making copies of the spiral and using pieces of it for each curve. I then informed him that all the curves in his image were just circular segments. [[Special:Contributions/172.69.69.44|172.69.69.44]] 16:36, 20 June 2020 (UTC) | A friend of mine, attempting to do graphic design, once created an approximate golden spiral using the boxes diagram with quarter circles. He then laboriously produced a logo by making copies of the spiral and using pieces of it for each curve. I then informed him that all the curves in his image were just circular segments. [[Special:Contributions/172.69.69.44|172.69.69.44]] 16:36, 20 June 2020 (UTC) | ||
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