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Egyptian geometry

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20: 1754: 1706: 1743: 1774: 161: 1784: 77: 1764: 157:. These cubits are 52.5 cm (20.7 in) long and are divided into palms and hands: each palm is divided into four fingers from left to right and the fingers are further subdivided into ro from right to left. The rules are also divided into hands so that for example one foot is given as three hands and fifteen fingers and also as four palms and sixteen fingers. 648:
Problem 50 of the RMP finds the area of a round field of diameter 9 khet. This is solved by using the approximation that circular field of diameter 9 has the same area as a square of side 8. Problem 52 finds the area of a trapezium with (apparently) equally slanting sides. The lengths of the parallel
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in London. The problem also demonstrates that the Egyptians were familiar with square roots. They even had a special hieroglyph for finding a square root. It looks like a corner and appears in the fifth line of the problem. Scholars suspect that they had tables giving the square roots of some often
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The ancient Egyptians wrote out their problems in multiple parts. They gave the title and the data for the given problem, in some of the texts they would show how to solve the problem, and as the last step they verified that the problem was correct. The scribes did not use any variables and the
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The Nile occupied an important position in Egyptian culture; it influenced the development of mathematics, geography, and the calendar; Egyptian geometry advanced due to the practice of land measurement "because the overflow of the Nile caused the boundary of each person's land to
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That this octagonal figure, whose area is easily calculated, so accurately approximates the area of the circle is just plain good luck. Obtaining a better approximation to the area using finer divisions of a square and a similar argument is not simple.
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Several problems compute the volume of cylindrical granaries (41, 42, and 43 of the RMP), while problem 60 RMP seems to concern a pillar or a cone instead of a pyramid. It is rather small and steep, with a seked (slope) of four palms (per cubit).
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Problem 49 from the RMP finds the area of a rectangular plot of land Problem 6 of MMP finds the lengths of the sides of a rectangular area given the ratio of the lengths of the sides. This problem seems to be identical to one of the
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rods. Examples have been found in the tombs of officials, noting lengths up to remen. Royal cubits were used for land measures such as roads and fields. Fourteen rods, including one double-cubit rod, were described and compared by
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shows surveyors measuring a plot of land using rope with knots tied at regular intervals. Similar scenes can be found in the tombs of Amenhotep-Sesi, Khaemhat and Djeserkareseneb. The balls of rope are also shown in
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Clagett, Marshall Ancient Egyptian Science, A Source Book. Volume Three: Ancient Egyptian Mathematics (Memoirs of the American Philosophical Society) American Philosophical Society. 1999
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computes the volume of a granary with a circular base. A similar problem and procedure can be found in the Rhind papyrus (problem 43). Several problems in the
1006:. Such a formula would be needed for building pyramids. In the next problem (Problem 57), the height of a pyramid is calculated from the base length and the 483:
Problem 48 of the RMP compares the area of a circle (approximated by an octagon) and its circumscribing square. This problem's result is used in problem 50.
64:(RMP). The examples demonstrate that the ancient Egyptians knew how to compute areas of several geometric shapes and the volumes of cylinders and pyramids. 107:
diagram shows how to construct a circular vault using body measures along an arc. If the area of the Square is 434 units. The area of the circle is 433.7.
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Problem 56 of the RMP indicates an understanding of the idea of geometric similarity. This problem discusses the ratio run/rise, also known as the
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Trisect each side. Remove the corner triangles. The resulting octagonal figure approximates the circle. The area of the octagonal figure is:
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A translation of the problem and its solution as it appears on the fragment is given on the website maintained by University College London.
784: 1426: 1498: 1010:(Egyptian for slope), while problem 58 gives the length of the base and the height and uses these measurements to compute the seked. 122:. A curve is divided into five sections and the height of the curve is given in cubits, palms, and digits in each of the sections. 1727: 1555: 305: 1355: 1267: 1044: 474:
An area of 40 "mH" by 3 "mH" shall be divided in 10 areas, each of which shall have a width that is 1/2 1/4 of their length.
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used numbers. No such tables have been found however. Problem 18 of the MMP computes the area of a length of garment-cloth.
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We only have a limited number of problems from ancient Egypt that concern geometry. Geometric problems appear in both the
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Surveying and itinerant measurement were undertaken using rods, poles, and knotted cords of rope. A scene in the tomb of
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Problem 14 of the Moscow Mathematical Papyrus computes the volume of a truncated pyramid, also known as a frustum.
492: 103:, when the height of the Nile was recorded as 6 cubits and 1 palm (about 3.217 m or 10 ft 6.7 in). A 1663: 1431: 1695: 1641: 1493: 725: 1285:
R.C. Archibald Mathematics before the Greeks Science, New Series, Vol.71, No. 1831, (Jan. 31, 1930), pp.109-121
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If you construct a pyramid with base side 12 and with a seked of 5 palms 1 finger; what is its altitude?
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In Problem 59 part 1 computes the seked, while the second part may be a computation to check the answer:
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problems were written in prose form. The solutions were written out in steps, outlining the process.
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to preserve the layout and ownership of farmland, which was flooded annually by the
1636: 1550: 1333: 1311: 1294: 111: 1369: 1337: 1091:, Architecture and Mathematics in Ancient Egypt, Cambridge University Press, 2007 139: 131: 1616: 1802: 1409: 1088: 173: 154: 89: 38: 19: 1678: 115: 143: 1717: 1378: 93: 50: 46: 852:{\displaystyle V={\frac {32}{27}}d^{2}\ h={\frac {128}{27}}r^{2}\ h} 160: 1589: 182: 42: 34: 692:(numbers 44, 45, 46) compute the volume of a rectangular granary. 76: 1631: 664: 260:
Problem 49 in RMP and problems 6 in MMP and Lahun LV.4. problem 1
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sides and the distance between them being the given numbers.
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Problem 10 of the MMP computes the area of a hemisphere.
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The ancient Egyptians knew that the area of a triangle is
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d= diameter. This uses the value 256/81 = 3.16049... for
150: 354:{\displaystyle A={\frac {1}{4}}({\frac {256}{81}})d^{2}} 1122: 924: 875: 787: 728: 597: 562: 495: 415: 369: 308: 268: 218: 1033:
Erlikh, Ḥagai; Erlikh, Hạggai; Gershoni, I. (2000).
1032: 1220: 984: 899: 851: 763: 632: 581: 548: 440: 381: 353: 300:Problems 51 in RMP and problems 4, 7 and 17 in MMP 283: 243: 1281: 1279: 1277: 1275: 985:{\displaystyle V={\frac {1}{3}}(a^{2}+ab+b^{2})h} 472:The Lahun Papyrus Problem 1 in LV.4 is given as: 210:Problem 51 in RMP and problems 4, 7 and 17 in MMP 1800: 633:{\displaystyle 4({\frac {8}{9}})^{2}=3.16049...} 84:Egyptian units of length are attested from the 1272: 1198:. Griffith Institute Asmolean Museum, Oxford. 1106:Ancient Egyptian Construction and Architecture 556:Next we approximate 63 to be 64 and note that 549:{\displaystyle 9^{2}-4{\frac {1}{2}}(3)(3)=63} 1394: 1371:Die Alt-Aegyptische Elle und Ihre Eintheilung 1039:. Lynne Rienner Publishers. pp. 80–81. 680:A problem appearing in section IV.3 of the 125:At some point, lengths were standardized by 88:. Although it dates to the 5th dynasty, the 764:{\displaystyle V={\frac {256}{81}}r^{2}\ h} 1401: 1387: 1258: 1256: 1254: 1252: 1250: 1248: 1246: 1244: 1339:Ancient Egyptian Science: A Source Book, 1103: 1408: 1218: 1193: 1168: 1143: 663: 159: 75: 18: 1364: 1332: 1241: 1223:Mathematics in the Time of the Pharaohs 1196:A Concise Dictionary of Middle Egyptian 1128: 1073: 96:during the reign of the Early Dynastic 1801: 149:Another was found in the tomb of Kha ( 1382: 1763: 1139: 1137: 1099: 1097: 1084: 1082: 1069: 1067: 1036:The Nile: Histories, Cultures, Myths 1783: 1315:Digitalegypt website: Lahun Papyrus 1298:Digitalegypt website: Lahun Papyrus 13: 1212: 908:w = width, l = length, h = height 441:{\displaystyle A={\frac {1}{2}}bh} 244:{\displaystyle A={\frac {1}{2}}bh} 134:. Two examples are known from the 14: 1825: 1511:Ancient Egyptian race controversy 1187: 1134: 1094: 1079: 1064: 640:plays the role of Ď€ = 3.14159.... 185:, Amenemhet-Surer, and Penanhor. 1782: 1772: 1762: 1753: 1752: 1741: 1704: 712:Formula (using modern notation) 202:Formula (using modern notation) 164:Cubit rod from the Turin Museum. 37:as it was developed and used in 1773: 1326: 1305: 1288: 382:{\displaystyle \pi =3.14159...} 112:ostracon depicting this diagram 1173:. Oxford: Griffith Institute. 1162: 1026: 976: 941: 615: 601: 537: 531: 528: 522: 338: 325: 1: 1374:(in German). Berlin: DĂĽmmler. 1019: 668:Image of Problem 14 from the 181:statues of officials such as 45:was a necessary outgrowth of 16:Geometry emanating from Egypt 1343:Ancient Egyptian Mathematics 1171:Egyptian Grammar 3rd Edition 7: 1696:Egypt–Mesopotamia relations 1516:Population history of Egypt 913:Truncated pyramid (frustum) 697: 686:Moscow Mathematical Papyrus 670:Moscow Mathematical Papyrus 187: 58:Moscow Mathematical Papyrus 10: 1830: 1219:Gillings, Richard (1972). 1194:Faulkner, Raymond (1991). 1144:Loprieno, Antonio (1996). 1104:Englebach, Clarke (1990). 690:Rhind Mathematical Papyrus 659: 92:recorded the level of the 62:Rhind Mathematical Papyrus 25:Rhind Mathematical Papyrus 1736: 1713: 1702: 1440: 1417: 900:{\displaystyle V=w\ l\ h} 771:measured in cubic-cubits 682:Lahun Mathematical Papyri 466:Lahun Mathematical Papyri 1748:Ancient Egypt portal 1169:Gardiner, Allen (1994). 997: 688:(problem 14) and in the 582:{\displaystyle 64=8^{2}} 67: 986: 901: 853: 765: 673: 634: 583: 550: 442: 383: 355: 292:b = base, h = height 285: 252:b = base, h = height 245: 165: 81: 27: 1422:Glossary of artifacts 1366:Lepsius, Karl Richard 987: 902: 864:Rectangular granaries 854: 776:Cylindrical granaries 766: 717:Cylindrical granaries 667: 635: 584: 551: 443: 384: 356: 286: 246: 163: 86:Early Dynastic Period 79: 22: 1809:Egyptian mathematics 922: 873: 867:RMP 44-46 and MMP 14 859:(measured in khar). 785: 726: 595: 560: 493: 413: 367: 306: 284:{\displaystyle A=bh} 266: 216: 1814:History of geometry 1568:Cursive hieroglyphs 1108:. New York: Dover. 702: 192: 142:, the treasurer of 114:was found near the 1541:Funerary practices 1348:Memoirs of the APS 982: 897: 849: 779:RMP 42, Lahun IV.3 761: 698: 674: 630: 579: 546: 438: 379: 351: 281: 241: 188: 166: 82: 28: 1796: 1795: 1551:Great Royal Wives 1521:Prehistoric Egypt 1357:978-0-87169-232-0 1334:Clagett, Marshall 1268:978-0-87169-232-0 1148:. New York: CUP. 1131:, pp. 57 ff. 1046:978-1-55587-672-2 995: 994: 939: 893: 887: 845: 831: 816: 802: 757: 743: 612: 520: 430: 403: 402: 397:Problem 10 in MMP 336: 323: 233: 60:(MMP) and in the 31:Egyptian geometry 1821: 1786: 1785: 1776: 1775: 1766: 1765: 1756: 1755: 1746: 1745: 1744: 1708: 1403: 1396: 1389: 1380: 1379: 1375: 1361: 1320: 1316: 1312:Annette Imhausen 1309: 1303: 1299: 1295:Annette Imhausen 1292: 1286: 1283: 1270: 1260: 1239: 1238: 1226: 1216: 1210: 1209: 1191: 1185: 1184: 1166: 1160: 1159: 1146:Ancient Egyptian 1141: 1132: 1126: 1120: 1119: 1101: 1092: 1086: 1077: 1071: 1062: 1061: 1055: 1053: 1030: 991: 989: 988: 983: 975: 974: 953: 952: 940: 932: 906: 904: 903: 898: 891: 885: 858: 856: 855: 850: 843: 842: 841: 832: 824: 814: 813: 812: 803: 795: 770: 768: 767: 762: 755: 754: 753: 744: 736: 703: 639: 637: 636: 631: 623: 622: 613: 605: 591:Thus the number 588: 586: 585: 580: 578: 577: 555: 553: 552: 547: 521: 513: 505: 504: 447: 445: 444: 439: 431: 423: 388: 386: 385: 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Retrieved 1035: 1028: 1014: 1012: 1007: 1001: 699: 694: 679: 675: 652: 651: 647: 643: 590: 489: 486: 479: 478: 473: 471: 459: 458: 453: 449: 405: 404: 363: 189: 167: 148: 124: 116:Step Pyramid 109: 83: 71: 55: 30: 29: 1788:WikiProject 1602:Mathematics 1563:Hieroglyphs 1477:Portraiture 1445:Agriculture 1432:Main topics 1059:disappear." 653:Hemisphere: 460:Rectangles: 452:= base and 179:New Kingdom 144:Tutankhamun 1803:Categories 1718:Egyptology 1686:Technology 1649:Philosophy 1597:Literature 1489:Chronology 1234:0262070456 1205:0900416327 1180:0900416351 1155:0521448492 1115:0486264858 1020:References 628:3.16049... 406:Triangles: 394:hemisphere 377:3.14159... 257:rectangles 94:Nile River 51:Nile river 33:refers to 1622:Mythology 1546:Geography 1536:Dynasties 1484:Astronomy 1341:Vol. III: 1052:9 January 507:− 371:π 47:surveying 1758:Category 1679:District 1674:Capitals 1659:Religion 1642:Titulary 1632:Pharaohs 1612:Military 1607:Medicine 1590:Hieratic 1580:Language 1506:Clothing 1460:Obelisks 1368:(1865). 1336:(1999). 480:Circles: 207:triangle 183:Senenmut 138:tomb of 43:geometry 41:. Their 35:geometry 1778:Outline 1768:Commons 1728:Museums 1664:Scribes 1654:Pottery 1585:Demotic 1575:History 1526:Cuisine 1455:Revival 1227:. MIT. 700:Volumes 660:Volumes 136:Saqqara 132:Lepsius 120:Saqqara 98:pharaoh 1627:People 1494:Cities 1412:topics 1354:  1266:  1231:  1202:  1177:  1152:  1112:  1043:  916:MMP 14 892:  886:  844:  815:  756:  720:RMP 41 709:Source 706:Object 448:where 297:circle 199:Source 196:Object 174:Thebes 155:Thebes 1691:Trade 1669:Sites 1617:Music 1531:Dance 1465:Pylon 1427:Index 1318:LV.4 1301:IV.3 1008:seked 1004:seked 998:Seked 190:Areas 170:Menna 153:) in 127:cubit 1637:List 1556:List 1499:List 1352:ISBN 1264:ISBN 1229:ISBN 1200:ISBN 1175:ISBN 1150:ISBN 1110:ISBN 1054:2020 1041:ISBN 140:Maya 110:The 101:Djer 68:Area 23:The 1472:Art 826:128 738:256 331:256 172:in 151:TT8 118:of 1805:: 1346:. 1274:^ 1243:^ 1136:^ 1096:^ 1081:^ 1066:^ 1056:. 829:27 800:27 797:32 741:81 564:64 544:63 334:81 146:. 53:. 1402:e 1395:t 1388:v 1360:. 1237:. 1208:. 1183:. 1158:. 1118:. 1076:. 980:h 977:) 972:2 968:b 964:+ 961:b 958:a 955:+ 950:2 946:a 942:( 937:3 934:1 929:= 926:V 895:h 889:l 883:w 880:= 877:V 847:h 839:2 835:r 821:= 818:h 810:2 806:d 792:= 789:V 759:h 751:2 747:r 733:= 730:V 625:= 620:2 616:) 610:9 607:8 602:( 599:4 575:2 571:8 567:= 541:= 538:) 535:3 532:( 529:) 526:3 523:( 518:2 515:1 510:4 502:2 498:9 454:h 450:b 436:h 433:b 428:2 425:1 420:= 417:A 374:= 347:2 343:d 339:) 326:( 321:4 318:1 313:= 310:A 279:h 276:b 273:= 270:A 239:h 236:b 231:2 228:1 223:= 220:A

Index


Rhind Mathematical Papyrus
geometry
Ancient Egypt
geometry
surveying
Nile river
Moscow Mathematical Papyrus
Rhind Mathematical Papyrus

Early Dynastic Period
Palermo stone
Nile River
pharaoh
Djer
Third Dynasty
ostracon depicting this diagram
Step Pyramid
Saqqara
cubit
Lepsius
Saqqara
Maya
Tutankhamun
TT8
Thebes

Menna
Thebes
New Kingdom

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