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Talk:Cube

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approximate due to 3D perspective. If the cube is transparent so the flatlander can see inside, there will also be two extra vertices and six additional edges joining them alternately to the outer vertices - all done with overlapping (and possibly approximate) quadrilateral zonogons, more commonly known as parallelograms. As the cube rotates, the four vertex pairs will take it in turn to disappear inside for a while. As the cube rots, edges will wiggle, then blur, then disappear so the thing becomes a shapless pulsing blob, shades of colour will vary, and the smell will worsen for a while before fading away to leave a small, hardened residue stuck to flatland. HTH — Cheers,
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Nope. Just as 4D projects down to us as 3D, so 3D projects down to a flatlander as 2D. It will start as a hexagonal zonogon, i.e. whose opposite sides are parallel and equal-sized. As the cube rotates, the side pairs will morph in length and angle. Depending on the projection, this description may be
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page and I saw a 3D projection of a rotating 4-cube. This would be what we would see if a rotating, clear tesseract suddenly appeared in front of us. I thought that if 3Dals (meaning three-dimensional ) could see a simplified 4Dal, then a 2Dal may see asimple 3Dal. Could someone describe a
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I was a bit confused about the sentence "A cube has 11 net faces", since I read it as something like "The net of a cube has 11 faces" (or "The cube has 11 faces of type net", but that gave no meaning..). At first I thought it was a typo, but then I got it. To me it seems like "A cube has 11
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I've just had a long discussion with the father of a nine year old who was told at school that the number of sides a solid cylindrical object (e.g. tin can) has is two, and the number of edges is zero. This is all based upon the understanding in the school syllabus where a
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is a flat surface, and an edge is where two sides meet. This leads to things like a sphere as having no sides. Well all this seems rather badly defined to me, and made me wonder if the definition here is all that it could be.
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I replace stat table with template version, which uses tricky nested templates as a "database" which allows the same data to be reformatted into multiple locations and formats. See here for more details:
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An IP editor left the following request in the article: "Could someone please add the internal angles within a cube. I am particularly interested in the angles of the internal diagonal. Thank you." --
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I replaced this, which was incomprehensibly vague, by a brief description of the cube graph and the 3-dimensional Hamming graph. A full discussion of either one appears in separate articles,
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The cube can also be represented as a spherical tiling, and projected onto the plane via a stereographic projection. This projection is conformal, preserving angles but not areas or lengths
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AFAIK the formula for a circumscribing sphere for a cube needs to be the square root of _A squared_ times three, over two. As it is currently, I think it's wrong.
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projection of a rotting cube as a Flatlander would see it to me? An animation would probably be helpful, if it isn't to much trouble. Merci bien,
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The largest section (cutting the cube with a plane) is the one obtained through the diagonals of one of the sides, the area of this section is
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A Flatlander sees only a line, varying in length; with appropriate lighting, the line is divided into segments of different shades. —
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When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
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since the space diagonal should be precisely twice the radius of circumscribed sphere. sqrt(3)*a is not twice (sqrt(3)/2)*a
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something. It doesn't work to just spout the first words that come to mind as though you are speaking to a college classmate.
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I think that would be better. However, one person (and anom. at that) doesn't make a consensus. I think you better wait.
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A cube is a three-dimensional solid object bounded by six square flat surfaces, with three surfaces meeting at each vertex.
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and "n-cube". There is a move being considered of the page "measure polytope" to "hypercube" (see their talk pages).
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is good term for 2 dimensional objects like a square or a triangle etc. A 3D object is better described in terms of
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to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
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That is why it is important to state exactly what projection is being discussed: a projection that goes
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There is clearly consensus against this proposal, so I shall remove the merge tags from the articles.
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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before doing mass systematic removals. This message is updated dynamically through the template
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The following Wikimedia Commons file used on this page has been nominated for deletion:
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If you found an error with any archives or the URLs themselves, you can fix them with
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is the length of a side. Is this worth mentioning? If no one objects, I will add it.
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https://web.archive.org/web/20071009235233/http://polyhedra.org/poly/show/1/cube
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is not working in in the ToC, anyone know better than me that can fix it?
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is certainly the wrong page to even consider a merge to; and I'd also
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If sqrt(3)*a is not twice (sqrt(3)/2)*a, how would you change it? —
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A rotting cube would appear to a Flatlander as a smelly line. :-)
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A Commons file used on this page has been nominated for deletion
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http://en.wikipedia.org/search/?title=Cube&oldid=327931331
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Oops, thats an octahedron. Do you think it should go on the
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There are five parallelohedrons, one of which is the cube.
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for additional information. I made the following changes:
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could each have a brief passage comparing the ∞-norm (
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For a cube, try max(|x|, |y|, |z|) = s/2, instead. --
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Added Coxeter diagram for the trigonal trapezohedron
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How can you cut a cube to get the largest section ?
1298: 1050: 491: 471: 310:This article has not yet received a rating on the 995:Reader feedback: How can you cut a cube to ge... 1585:Knowledge level-4 vital articles in Mathematics 636:We need some terminology cleaned up. The name 1199:Participate in the deletion discussion at the 1112:This message was posted before February 2018. 944:You're right, "11 net faces" makes no sense. — 8: 333:If each edge of a cube is replaced by a one 1377:would unnecessarily lengthen this article. 618:are apparently part of a long pattern, see 1394:This article is about geometry. You want 1082:I have just modified one external link on 730: 233: 163: 58: 1290: 1286: 1285: 1282: 1042: 1031: 1023: 484: 462: 451: 443: 435: 427: 419: 411: 409: 1371:is specific enough that merging it into 844:Circumscribing sphere for cube is wrong. 666:. If the person who wanted to describe 472:{\displaystyle |x|+|y|+|z|=s{\sqrt {2}}} 1575:Knowledge vital articles in Mathematics 640:is rare at best. I have changed it to 235: 165: 60: 19: 1351:, this is an important factorization. 874:. I reformatted a bit; clearer now? — 509:Are you sure that's a cube and not an 214:Knowledge:WikiProject Spoken Knowledge 1610:Unknown-importance Polyhedra articles 1590:B-Class vital articles in Mathematics 1104:http://polyhedra.org/poly/show/1/cube 217:Template:WikiProject Spoken Knowledge 7: 620:Knowledge:Long term abuse/Videogamer 262:This article is within the scope of 192:This article is within the scope of 106:This article is within the scope of 49:It is of interest to the following 1600:High-priority mathematics articles 1051:{\displaystyle A={\sqrt {2}}a^{2}} 360:User:Tomruen/polyhedron_db_testing 14: 1086:. Please take a moment to review 126:Knowledge:WikiProject Mathematics 1570:Knowledge level-4 vital articles 1497: 1328:Seems to me that the content of 1299:{\displaystyle \mathbb {R} ^{3}} 1239:The article defines a cube as a 964:for the sake of completeness. — 255: 237: 185: 167: 129:Template:WikiProject Mathematics 93: 83: 62: 29: 20: 1236:projection is being discussed. 569:), 2-norm (sphere) and 1-norm ( 290:Knowledge:WikiProject Polyhedra 146:This article has been rated as 1580:B-Class level-4 vital articles 864:22:18, 30 September 2009 (UTC) 599:I've added three sentences to 452: 444: 436: 428: 420: 412: 293:Template:WikiProject Polyhedra 1: 1456:23:48, 25 February 2024 (UTC) 1408:06:32, 26 November 2023 (UTC) 1388:01:05, 24 November 2023 (UTC) 1361:01:36, 23 November 2023 (UTC) 1342:01:59, 17 November 2023 (UTC) 1070:04:16, 24 November 2013 (UTC) 918:08:19, 28 November 2009 (UTC) 903:17:43, 26 November 2009 (UTC) 870:The radical didn't cover the 679:07:44, 21 November 2006 (UTC) 649:02:02, 16 November 2006 (UTC) 586:That's an excellent idea. -- 284:and see a list of open tasks. 208:and see a list of open tasks. 120:and see a list of open tasks. 1595:B-Class mathematics articles 1438:12:06, 3 December 2023 (UTC) 1316:22:04, 2 December 2021 (UTC) 1247:of the 3-dimensional cube. 884:20:17, 11 October 2009 (UTC) 780:20:23, 2 November 2007 (UTC) 760:20:18, 2 November 2007 (UTC) 348:09:25, 10 January 2006 (UTC) 195:WikiProject Spoken Knowledge 1551:02:32, 24 August 2024 (UTC) 1332:really belongs here. Yeah? 1268:06:44, 3 January 2020 (UTC) 1180:06:14, 15 August 2017 (UTC) 698:10:40, 5 January 2007 (UTC) 627:05:21, 25 August 2006 (UTC) 404:The equation for a cube is 1626: 1605:B-Class Polyhedra articles 1143:(last update: 5 June 2024) 1079:Hello fellow Wikipedians, 989:05:00, 22 April 2013 (UTC) 974:00:01, 22 April 2013 (UTC) 795:04:36, 7 August 2009 (UTC) 770:I was just looking at the 312:project's importance scale 1516:04:26, 24 July 2024 (UTC) 1491:03:03, 24 July 2024 (UTC) 1349:difference of two squares 834:11:30, 7 March 2013 (UTC) 810:15:20, 5 March 2013 (UTC) 749:05:35, 18 June 2007 (UTC) 608:22:15, 14 June 2006 (UTC) 591:21:28, 14 June 2006 (UTC) 578:17:32, 13 June 2006 (UTC) 548:15:06, 13 June 2006 (UTC) 534:13:37, 13 June 2006 (UTC) 523:13:31, 13 June 2006 (UTC) 504:15:06, 13 June 2006 (UTC) 369:00:53, 4 March 2006 (UTC) 309: 250: 220:Spoken Knowledge articles 180: 145: 78: 57: 1530:non-composite polyhedron 1213:17:52, 18 May 2019 (UTC) 954:17:00, 27 May 2011 (UTC) 939:11:10, 23 May 2011 (UTC) 684:Request: Internal angles 614:those idiot redirections 394:15:16, 17 May 2006 (UTC) 384:02:12, 17 May 2006 (UTC) 152:project's priority scale 1194:Rhombicdodecahedron.jpg 1075:External links modified 109:WikiProject Mathematics 1565:B-Class vital articles 1300: 1052: 1013: 999:183.179.103.36 posted 493: 473: 1301: 1053: 1009: 1003:on 12 November 2013 ( 889:It seems wrong as of 654:"Combinatorial cubes" 494: 474: 375:added face/facet/side 265:WikiProject Polyhedra 36:level-4 vital article 1477:are one of the five 1281: 1124:regular verification 1022: 483: 408: 379:to clarify meaning. 132:mathematics articles 1481:of parallelohedra. 1426:Sums of three cubes 1273:ToC entry #4 broken 1241:3-dimensional solid 1114:After February 2018 766:How would this look 389:Was it in doubt? — 1296: 1205:Community Tech bot 1168:InternetArchiveBot 1119:InternetArchiveBot 1048: 601:Norm (mathematics) 489: 469: 296:Polyhedra articles 101:Mathematics portal 45:content assessment 1462:counting families 1232:it is not stated 1222:In this passage: 1144: 1036: 1005:view all feedback 924:Net faces or nets 854:comment added by 812: 751: 735:comment added by 492:{\displaystyle s} 467: 326: 325: 322: 321: 318: 317: 232: 231: 228: 227: 162: 161: 158: 157: 1617: 1533: 1505: 1501: 1500: 1469: 1368:Sum of two cubes 1330:Sum of two cubes 1323:Sum of two cubes 1305: 1303: 1302: 1297: 1295: 1294: 1289: 1178: 1169: 1142: 1141: 1120: 1057: 1055: 1054: 1049: 1047: 1046: 1037: 1032: 866: 799: 638:measure polytope 567:measure polytope 553:Yes, go ahead. 498: 496: 495: 490: 478: 476: 475: 470: 468: 463: 455: 447: 439: 431: 423: 415: 298: 297: 294: 291: 288: 259: 252: 251: 241: 234: 222: 221: 218: 215: 212: 211:Spoken Knowledge 189: 182: 181: 175:Spoken Knowledge 171: 164: 134: 133: 130: 127: 124: 103: 98: 97: 87: 80: 79: 74: 66: 59: 42: 33: 32: 25: 24: 16: 1625: 1624: 1620: 1619: 1618: 1616: 1615: 1614: 1555: 1554: 1524: 1498: 1496: 1473:I would say cub 1464: 1326: 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764: 763: 762: 704: 701: 685: 682: 655: 652: 633: 630: 615: 612: 611: 610: 596: 595: 594: 593: 581: 580: 571:cross polytope 537: 536: 526: 525: 488: 466: 461: 458: 454: 450: 446: 442: 438: 434: 430: 426: 422: 418: 414: 401: 398: 397: 396: 376: 373: 372: 371: 354: 353:New stat table 351: 330: 327: 324: 323: 320: 319: 316: 315: 308: 302: 301: 299: 282:the discussion 260: 248: 247: 242: 230: 229: 226: 225: 223: 206:the discussion 190: 178: 177: 172: 160: 159: 156: 155: 144: 138: 137: 135: 118:the discussion 105: 104: 88: 76: 75: 67: 55: 54: 48: 26: 13: 10: 9: 6: 4: 3: 2: 1622: 1611: 1608: 1606: 1603: 1601: 1598: 1596: 1593: 1591: 1588: 1586: 1583: 1581: 1578: 1576: 1573: 1571: 1568: 1566: 1563: 1562: 1560: 1553: 1552: 1548: 1544: 1541:polyhedron". 1540: 1539:non-composite 1531: 1526: 1525: 1521: 1517: 1513: 1509: 1504: 1495: 1494: 1493: 1492: 1488: 1484: 1480: 1476: 1466: 1465: 1461: 1457: 1453: 1449: 1445: 1444: 1439: 1435: 1431: 1427: 1423: 1419: 1415: 1411: 1410: 1409: 1405: 1401: 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274:polyhedra 245:Polyhedra 39:is rated 1543:—Tamfang 1483:—Tamfang 1412:Indeed: 1400:—Tamfang 1365:Agreed. 1308:Snus-kin 1164:Cheers.— 981:Tom Ruen 852:unsigned 745:contribs 733:unsigned 722:surfaces 716:I think 479:, where 400:Equation 366:Tom Ruen 345:Tom Ruen 338:resistor 270:polygons 1430:Klbrain 1245:surface 1088:my edit 946:Tamfang 910:Tamfang 876:Tamfang 787:Tamfang 624:Tamfang 605:Tamfang 575:Tamfang 391:Tamfang 150:on the 41:B-class 1418:oppose 1380:cmɢʟee 676:Zaslav 646:Zaslav 559:Sphere 543:page? 381:0waldo 329:Trivia 201:spoken 47:scale. 1479:kinds 670:-ary 573:). — 513:? -- 28:This 1547:talk 1512:talk 1503:Done 1487:talk 1475:oids 1452:talk 1434:talk 1414:Cube 1404:talk 1385:τaʟκ 1374:cube 1357:talk 1338:talk 1312:talk 1264:talk 1252:from 1234:what 1209:talk 1084:Cube 1066:talk 985:talk 970:talk 950:talk 935:talk 914:talk 899:talk 880:talk 860:talk 830:Talk 806:talk 791:talk 741:talk 718:side 710:side 694:talk 662:and 622:. — 603:. — 561:and 555:Cube 519:talk 142:High 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