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Pyramid (geometry)

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345: 354: 177: 406: 186: 394: 166: 157: 95: 560: 266:: the pyramids are symmetrical as they rotated around their axis of symmetry (a line passing through the apex and the base centroid), and they are mirror symmetric relative to any perpendicular plane passing through a bisector of the base. Examples are 86:, the term evolved to "πυραμίδα" (pyramída), continuing to denote pyramid structures. The Greek term "πυραμίς" was borrowed into Latin as "pyramis." The term "πυραμίδα" influenced the evolution of the word into "pyramid" in English and other languages. 204:
is a pyramid where the base is circumscribed about the circle and the altitude of the pyramid meets at the circle's center. This pyramid may be classified based on the regularity of its bases. A pyramid with a regular polygon as the base is called a
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term "πυραμίς" (pyramis), which referred to a pyramid-shaped structure and a type of wheat cake. The term is rooted in the Greek "πυρ" (pyr, 'fire') and "άμις" (amis, 'vessel'), highlighting the shape's pointed, flame-like appearance.
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dimensional hyperplane. A point called the apex is located outside the hyperplane and gets connected to all the vertices of the polytope and the distance of the apex from the hyperplane is called height.
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The surface area is the total area of each polyhedra's faces. In the case of a pyramid, its surface area is the sum of the area of triangles and the area of the polygonal base.
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The type of pyramids can be derived in many ways. The base regularity of a pyramid's base may be classified based on the type of polygon, and one example is the pyramid with
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with a polygonal base. Many types of pyramids can be found by determining the shape of bases, or cutting off the apex. It can be generalized into higher dimension, known as
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or triangular pyramid is an example that has four equilateral triangles, with all edges equal in length, and one of them is considered as the base. Because the faces are
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dimensional space. In the case of the pyramid, one connects all vertices of the base, a polygon in a plane, to a point outside the plane, which is the
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ICGG 2018 - Proceedings of the 18th International Conference on Geometry and Graphics: 40th Anniversary - Milan, Italy, August 3-7, 2018
937: 1400: 274:, a four- and five-triangular faces pyramid with a square and pentagon base, respectively; they are classified as the first and second 999: 896: 758: 633: 775:
The word meant "a kind of cake of roasted wheat-grains preserved in honey"; the Egyptian pyramids were named after its form. See
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defined a pyramid as a solid figure, constructed from one plane to one point. The context of his definition was vague until
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The family of a regular polygonal base pyramid: tetrahedron, square pyramid, pentagonal pyramid, and hexagonal pyramid.
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is defined as a polyhedron where its vertices lie on two parallel planes, with its lateral faces are triangles,
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Wohlleben, Eva (2019), "Duality in Non-Polyhedral Bodies Part I: Polyliner", in Cocchiarella, Luigi (ed.),
1783: 1724: 1714: 1659: 580:. The pyramid's height is the distance of the peak from the plane. This construction gets generalized to 1803: 1719: 1674: 114:. Historically, the definition of a pyramid has been described by many mathematicians in ancient times. 1763: 1689: 1637: 423: 313: 120: 115: 63: 102:
A pyramid is a polyhedron that may be formed by connecting a polygonal base and a point, called the
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The volume of a pyramid was recorded back in ancient Egypt, where they calculated the volume of a
1991: 1944: 1768: 1663: 1612: 1458: 1320:, Advances in Intelligent Systems and Computing, vol. 809, Springer, p. 485–486, 1269: 1261: 1156: 271: 244: 240: 328:, meaning their duals are the same as vertices corresponding to the edges and vice versa. Their 449:
The volume of a pyramid is the one-third product of the base's area and the height. Given that
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A right pyramid may also have a base with an irregular polygon. Examples are the pyramids with
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that the volume of a pyramid is incorrectly the half product of area's base and the height.
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Gillings, R. J. (1964), "The volume of a truncated pyramid in ancient Egyptian papyri",
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An Introduction to Geometrical Probability: Distributional Aspects with Applications
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if their regular faces and edges that are equal in length, and their symmetries are
554: 59: 176: 17: 1622: 1087:. See Chapter 11: Finite Symmetry Groups, 11.3 Pyramids, Prisms, and Antiprisms. 541: 405: 333: 297: 185: 110:. The edges connected from the polygonal base's vertices to the apex are called 434:; if the truncation plane is parallel to the base of a pyramid, it is called a 1954: 1842: 1632: 1599: 1359: 1325: 1193: 1185:
Introduction to Computational Origami: The World of New Computational Geometry
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defined it as the figure by putting the point together with a polygonal base.
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The Experimenter's A-Z of Mathematics: Math Activities with Computer Support
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Mathematics and Plausible Reasoning: Induction and analogy in mathematics
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is the height of a pyramid. Mathematically, the volume of a pyramid is:
156: 1959: 1934: 1265: 974: 532: 435: 373: 43: 759:"Henry George Liddell, Robert Scott, A Greek-English Lexicon, πυραμίς" 317: 1257: 1567: 94: 558: 93: 1627: 933:
A Mathematical Space Odyssey: Solid Geometry in the 21st Century
55: 1571: 106:. Each base edge and apex form an isosceles triangle, called a 1220:
The Routledge International Handbook of Innovation Education
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the height, that is the distance between the apex and the
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as their bases. These two pyramids have the symmetry of
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The hyperpyramid is the generalization of a pyramid in
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dimensional hyperpyramid can be computed as follows:
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Alexander, Daniel C.; Koeberlin, Geralyn M. (2014),
50:. Each base edge and apex form a triangle, called a 1902: 1877: 1852: 1827: 1743: 1651: 1606: 673: 523: 481: 461: 961:Grünbaum, Branko (1997), "Isogonal Prismatoids", 1420:(6th ed.), Cengage Learning, p. 403, 1127:(1966), "Convex polyhedra with regular faces", 563:4-dimensional hyperpyramid with a cube as base 1583: 1512:, Taylor & Francis, p. 42–43, 1348:Pisanski, Tomaž; Servatius, Brigitte (2013), 796:Liddell, Henry George; Scott, Robert (1940). 430:. The pyramid cut off by a plane is called a 8: 854:Harper's Dictionary of Classical Antiquities 674:{\displaystyle V_{n}={\frac {A\cdot h}{n}}.} 994:, Princeton University Press, p. 138, 837:Lewis, Charlton T.; Short, Charles (1879). 735:dimensional hyperplane containing the base 362:Pyramids with rectangular and rhombic bases 1856: 1590: 1576: 1568: 1389:, Cambridge University Press, p. 50, 915:Euclid: The Thirteen Books of the Elements 1501: 1499: 1142: 930:Alsina, Claudi; Nelsen, Roger B. (2015), 650: 641: 635: 502: 494: 474: 454: 143:. Pyramids are classified as prismatoid. 1417:Elementary Geometry for College Students 1351:Configuration from a Graphical Viewpoint 873:, Cambridge University Press, p. 13 701:dimensional volume of the hyperpyramid. 399:A pyramid truncated by an inclined plane 1290:The Humongous Book of Geometry Problems 1244:Cundy, H. Martyn (1952), "Deltahedra", 1100:An Introduction to the Theory of Groups 750: 1021:, John Wiley & Sons, p. 10, 963:Discrete & Computational Geometry 891:, John Wiley & Sons, p. 98, 7: 1048:, Taylor & Francis, p. 23, 74:The word "pyramid" derives from the 938:Mathematical Association of America 718:dimensional volume of the base and 524:{\displaystyle V={\frac {1}{3}}Bh.} 1103:, Dover Publications, p. 48, 25: 27:Conic solid with a polygonal base 782:Etymological Dictionary of Greek 404: 392: 352: 343: 324:. Pyramids have the property of 184: 175: 164: 155: 1403:from the original on 2013-12-11 1130:Canadian Journal of Mathematics 586:dimensions. The base becomes a 1293:, Penguin Group, p. 455, 1076:, Cambridge University Press, 1074:Geometries and Transformations 1: 1383:Wenninger, Magnus J. (1974), 1217:Shavinina, Larisa V. (2013), 852:Peck, Harry Thurston (1898). 316:. A pyramid with the base as 296:of order 10, respectively. A 46:base and a point, called the 1970:Degenerate polyhedra are in 1789:pentagonal icositetrahedron 1730:truncated icosidodecahedron 1287:Kelley, W. Michael (2009), 867:Cromwell, Peter R. (1997), 218:sided regular base, it has 2033: 1819:pentagonal hexecontahedron 1779:deltoidal icositetrahedron 1223:, Routledge, p. 333, 1097:Alexandroff, Paul (2012), 552: 426:as its base, known as the 332:may be represented as the 209:. For the pyramid with an 1968: 1859: 1814:disdyakis triacontahedron 1809:deltoidal hexecontahedron 1360:10.1007/978-0-8176-8364-1 1326:10.1007/978-3-319-95588-9 1194:10.1007/978-981-15-4470-5 1015:O'Leary, Michael (2010), 539:, where he quoted in his 1476:Cajori, Florian (1991), 1354:, Springer, p. 21, 1246:The Mathematical Gazette 1188:, Springer, p. 62, 1172:. See table III, line 1. 885:Smith, James T. (2000), 856:. Harper & Brothers. 621:dimensional volume of a 304:, it is an example of a 239:edges. Such pyramid has 147:Classification and types 1920:gyroelongated bipyramid 1794:rhombic triacontahedron 1700:truncated cuboctahedron 1443:The Mathematics Teacher 1182:Uehara, Ryuhei (2020), 1018:Revolutions of Geometry 798:A Greek–English Lexicon 469:is the base's area and 42:formed by connecting a 1915:truncated trapezohedra 1784:disdyakis dodecahedron 1750:(duals of Archimedean) 1725:rhombicosidodecahedron 1715:truncated dodecahedron 1506:Mathai, A. M. (1999), 1479:History of Mathematics 1144:10.4153/cjm-1966-021-8 1042:Humble, Steve (2016), 912:Heath, Thomas (1908), 675: 564: 525: 483: 463: 259:, a symmetry of order 99: 1804:pentakis dodecahedron 1720:truncated icosahedron 1675:truncated tetrahedron 784:, Brill, p. 1261 763:www.perseus.tufts.edu 676: 562: 526: 484: 464: 97: 2002:Prismatoid polyhedra 1764:rhombic dodecahedron 1690:truncated octahedron 1455:10.5951/MT.57.8.0552 634: 493: 473: 453: 424:regular star polygon 314:tetrahedral symmetry 2012:Pyramids (geometry) 1997:Self-dual polyhedra 1799:triakis icosahedron 1774:tetrakis hexahedron 1759:triakis tetrahedron 1695:rhombicuboctahedron 888:Methods of Geometry 243:as its faces, with 241:isosceles triangles 126:Heron of Alexandria 62:. All pyramids are 1769:triakis octahedron 1654:Archimedean solids 1551:Weisstein, Eric W. 1125:Johnson, Norman W. 1070:Johnson, Norman W. 988:Polya, G. (1954), 975:10.1007/PL00009307 841:. Clarendon Press. 839:A Latin Dictionary 800:. Clarendon Press. 671: 565: 521: 479: 459: 272:pentagonal pyramid 100: 98:Parts of a pyramid 18:Snub cubic pyramid 1979: 1978: 1898: 1897: 1735:snub dodecahedron 1710:icosidodecahedron 1519:978-90-5699-681-9 1489:978-1-4704-7059-3 1427:978-1-285-19569-8 1396:978-0-521-09859-5 1386:Polyhedron Models 1369:978-0-8176-8363-4 1335:978-3-319-95588-9 1300:978-1-61564-698-2 1230:978-0-203-38714-6 1203:978-981-15-4470-5 1110:978-0-486-48813-4 1083:978-1-107-10340-5 1055:978-1-134-13953-8 1028:978-0-470-59179-6 947:978-0-88385-358-0 778:Beekes, Robert S. 666: 510: 482:{\displaystyle h} 462:{\displaystyle B} 432:truncated pyramid 16:(Redirected from 2024: 2017:Geometric shapes 1857: 1853:Dihedral uniform 1828:Dihedral regular 1751: 1667: 1616: 1592: 1585: 1578: 1569: 1564: 1563: 1524: 1522: 1503: 1494: 1492: 1473: 1467: 1465: 1438: 1432: 1430: 1411: 1405: 1404: 1380: 1374: 1372: 1345: 1339: 1338: 1311: 1305: 1303: 1284: 1278: 1276: 1252:(318): 263–266, 1241: 1235: 1233: 1214: 1208: 1206: 1179: 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829: 818:. 12 July 2022 803: 788: 768: 749: 748: 746: 743: 686: 670: 665: 661: 658: 655: 649: 644: 640: 597:polytope in a 553:Main article: 550: 549:Generalization 547: 533:square frustum 520: 517: 514: 509: 506: 501: 498: 478: 458: 443: 440: 415:-base pyramid. 410: 403: 402: 398: 391: 390: 389: 388: 387: 381: 361: 360: 351: 350: 342: 341: 340: 339: 338: 306:Platonic solid 292: 283: 268:square pyramid 252: 193: 192: 183: 182: 174: 173: 172: 163: 162: 154: 153: 152: 151: 150: 148: 145: 141:parallelograms 91: 88: 71: 68: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2029: 2018: 2015: 2013: 2010: 2008: 2005: 2003: 2000: 1998: 1995: 1993: 1990: 1989: 1987: 1973: 1967: 1961: 1958: 1956: 1953: 1951: 1948: 1946: 1943: 1941: 1938: 1936: 1933: 1931: 1928: 1926: 1923: 1921: 1918: 1916: 1913: 1911: 1908: 1907: 1905: 1901: 1891: 1888: 1886: 1883: 1882: 1880: 1876: 1870: 1867: 1865: 1862: 1861: 1858: 1855: 1851: 1845: 1844: 1840: 1838: 1837: 1833: 1832: 1830: 1826: 1820: 1817: 1815: 1812: 1810: 1807: 1805: 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251: 246: 242: 237: 229: 222: 214: 208: 203: 202:right pyramid 187: 178: 167: 158: 146: 144: 142: 138: 134: 129: 127: 123: 122: 117: 113: 112:lateral edges 109: 105: 96: 89: 87: 85: 80: 77: 76:ancient Greek 69: 67: 65: 61: 57: 53: 49: 45: 41: 37: 33: 19: 1971: 1909: 1890:trapezohedra 1841: 1834: 1638:dodecahedron 1557: 1508: 1478: 1471: 1446: 1442: 1436: 1416: 1409: 1385: 1378: 1350: 1343: 1316: 1309: 1289: 1282: 1249: 1245: 1239: 1219: 1212: 1184: 1177: 1134: 1128: 1119: 1099: 1092: 1073: 1064: 1044: 1037: 1017: 1010: 990: 983: 966: 962: 956: 932: 925: 914: 907: 887: 880: 869: 862: 853: 847: 838: 832: 820:. Retrieved 815: 806: 797: 791: 781: 771: 762: 753: 737: 728: 720: 711: 707:denotes the 703: 695: 692:denotes the 687: 683: 624: 615: 611: 601: 590: 582: 570: 566: 555:Hyperpyramid 540: 448: 445: 431: 428:star pyramid 427: 421: 385:of order 4. 378: 367: 320:is known as 289: 280: 262: 253: 249: 245:its symmetry 235: 227: 220: 212: 206: 201: 199: 130: 119: 111: 108:lateral face 107: 101: 81: 73: 60:hyperpyramid 52:lateral face 51: 35: 29: 1660:semiregular 1643:icosahedron 1623:tetrahedron 1137:: 169–200, 542:Aryabhatiya 442:Mensuration 334:wheel graph 298:tetrahedron 232:faces, and 56:conic solid 1986:Categories 1955:prismatoid 1885:bipyramids 1869:antiprisms 1843:hosohedron 1633:octahedron 1169:0132.14603 816:Wiktionary 812:"πυραμίδα" 745:References 310:deltahedra 225:vertices, 137:trapezoids 133:prismatoid 90:Definition 54:. It is a 40:polyhedron 1992:Polyhedra 1950:birotunda 1940:bifrustum 1705:snub cube 1600:polyhedra 1559:MathWorld 1554:"Pyramid" 1537:Bipyramid 1274:250435684 1161:122006114 969:: 13–52, 870:Polyhedra 657:⋅ 537:Aryabhata 413:pentagram 370:rectangle 326:self-dual 70:Etymology 64:self-dual 44:polygonal 2007:Pyramids 1930:bicupola 1910:pyramids 1836:dihedron 1531:See also 1463:27957144 1401:archived 1072:(2018), 780:(2009), 330:skeleton 121:Elements 116:Euclides 32:geometry 1972:italics 1960:scutoid 1945:rotunda 1935:frustum 1664:uniform 1613:regular 1598:Convex 1266:3608204 1153:0185507 822:30 June 436:frustum 374:rhombus 302:regular 118:in his 36:pyramid 1925:cupola 1878:duals: 1864:prisms 1516:  1486:  1461:  1424:  1393:  1366:  1332:  1297:  1272:  1264:  1227:  1200:  1167:  1159:  1151:  1107:  1080:  1052:  1025:  998:  944:  895:  318:circle 139:, and 1459:JSTOR 1270:S2CID 1262:JSTOR 1157:S2CID 681:Here 38:is a 1628:cube 1514:ISBN 1484:ISBN 1422:ISBN 1391:ISBN 1364:ISBN 1330:ISBN 1295:ISBN 1225:ISBN 1198:ISBN 1105:ISBN 1078:ISBN 1050:ISBN 1023:ISBN 996:ISBN 942:ISBN 893:ISBN 824:2024 612:The 604:− 1) 593:− 1) 578:peak 372:and 322:cone 308:and 270:and 104:apex 48:apex 34:, a 1662:or 1451:doi 1356:doi 1322:doi 1254:doi 1190:doi 1165:Zbl 1139:doi 971:doi 247:is 230:+ 1 223:+ 1 82:In 30:In 1988:: 1556:. 1498:^ 1457:, 1447:57 1445:, 1399:, 1362:, 1328:, 1268:, 1260:, 1250:36 1248:, 1196:, 1163:, 1155:, 1149:MR 1147:, 1135:18 1133:, 967:18 965:, 936:, 814:. 761:, 741:. 438:. 411:A 382:2v 336:. 293:5v 284:4v 200:A 131:A 66:. 1974:. 1666:) 1658:( 1615:) 1611:( 1591:e 1584:t 1577:v 1562:. 1523:. 1493:. 1466:. 1453:: 1431:. 1373:. 1358:: 1324:: 1304:. 1277:. 1256:: 1234:. 1207:. 1192:: 1141:: 1114:. 1059:. 1032:. 1005:. 978:. 973:: 951:. 920:. 902:. 875:. 826:. 786:. 766:. 738:A 733:- 729:n 727:( 721:h 716:- 712:n 710:( 704:A 699:- 696:n 688:n 684:V 669:. 664:n 660:h 654:A 648:= 643:n 639:V 628:- 625:n 619:- 616:n 606:- 602:n 600:( 595:- 591:n 589:( 583:n 574:- 571:n 519:. 516:h 513:B 508:3 505:1 500:= 497:V 477:h 457:B 379:C 290:C 281:C 263:n 261:2 256:v 254:n 250:C 236:n 234:2 228:n 221:n 216:- 213:n 20:)

Index

Snub cubic pyramid
geometry
polyhedron
polygonal
apex
conic solid
hyperpyramid
self-dual
ancient Greek
Byzantine Greek

apex
Euclides
Elements
Heron of Alexandria
prismatoid
trapezoids
parallelograms




isosceles triangles
its symmetry
square pyramid
pentagonal pyramid
Johnson solid
tetrahedron
regular
Platonic solid

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