Inkanyezi Five olucijile. Udweba kanjani ngokushesha futhi kalula

inkanyezi Five enamaphoyinti - uphawu ohlonishwayo kakhulu kunazo zonke izizwe zomhlaba ngaso sonke isikhathi. izithombe zalo zitholakala ekuqaleni impucuko, lapho akuzange kusungulwe lokubhala.

Isithombe sokuqala ngqá inkanyezi ezinhlanu enamaphoyinti, zatholwa abavubukuli, sihlehlela emuva 3500 ngonyaka BC. It ethumba isitini, wathola lapho bemba edolobheni nesi ka Uruk.

uphawu inkanyezi yayidumile eGibhithe lasendulo neBabiloni. Wayelethwa lihlonishwa amaRoma namaGreki asendulo, ngaphandle ezinhlanu enamaphoyinti inkanyezi umfanekiso womjikelezo bemvelo. engeli Five Star amaGreki elihlobene ne-yizakhi ezinhlanu okwadala izwe lethu - umhlaba, amanzi, umoya, umlilo ether.

inkanyezi Five enamaphoyinti kuyinto imfanelo amajazi izikhali futhi amafulegi ithi eziningi zanamuhla futhi khona timphawu wezempi.

Kodwa ukudweba lesi sibalo ayinzima akulula njengoba kungase kubonakale efika kuqala.

Udweba kanjani inkanyezi ezinhlanu enamaphoyinti, ngaphandle oqeda ipensela kusukela ephepheni

Isikhova i-great sefilosofi esingumGreki nesazi sezibalo Pythagoras ngokuthi inkanyezi ezinhlanu enamaphoyinti sokuphelela zezibalo. Empeleni, lesi sibalo kungaba nzima ukudweba umugqa eziphukile, ngaphandle oqeda ipensela sheet iphepha abuyele ekupheleni okufanayo yekucala, elaqala ukudweba.

Nakhu yena, eyinkimbinkimbi futhi elula Uma unganakile, sibalo - inkanyezi ezinhlanu olucijile. Indlela udwebe umugqa eziphukile kusobala kusukela sibalo.

Udweba kanjani inkanyezi, ukusebenzisa irula lapho kusetshenzwa bese protractor

Manje sifunda indlela ukudweba efanele inkanyezi ezinhlanu olucijile. Of Instrumentation edingekayo umbusi futhi protractor.

Ukuze uthole inkanyezi, kubalulekile ukuba ubambe izingxenye obuphelele alinganayo ukuze engele zangaphakathi phakathi kwawo wonke vertices izibalo ezinhlanu wayelingana 36 °. In practice, lokhu kwenziwa ngendlela elandelayo - idwetshwa i-engela 36 °, kusukela izingxenye zalo phezulu obuphelele alinganayo kulinganiswa, futhi Endpoints zabo aphethwe oqondile entsha i-engela 36 °.

Kungenzeka futhi ukuba abhekane nenkinga ngendlela ethé ukuhluka kancane ngokudweba i pentagon equilateral nge vertices of engele of 106 °, bese kokujoyina izingxenye emagumbini alo okuphambene.

Uma uyobe uwugcina wonke izimo, uyogcina uthole enhle inkanyezi ezinhlanu olucijile. Udweba kanjani-ke ngendlela elula, ufunda.

Udweba kanjani inkanyezi ngosizo nekhampasi kanye protractor

Manje udinga ikhampasi kanye protractor. Njengoba obungazungeza 360 ° ke izingxenye 1/5 - 72 ° (360: 5 = 72). Ukuthola ukwakhiwa.

Dweba indilinga ikhampasi. Phawula esizoqala kuso - izinkanyezi phezulu futhi phakathi embuthanweni. Thatha protractor, beka phakathi nendawo yalo ne maphakathi umbuthano, futhi yonke selilonke obuphelele uqaphele ingozi esizayo inkanyezi iphuzu iphakama zonke 72 °.

Xhuma kubo ukuhlala iqonde, futhi uthole enhle inkanyezi ezinhlanu olucijile. Udweba kanjani-ke, uma kungekhona ususondele kuyoba protractor? Ngaphandle kwayo, ungenza, uzodinga kuphela umbusi ithuluzi kanye ikhampasi.

Udweba kanjani inkanyezi nombusi kanye ikhampasi

Indlela ukudweba ezinhlanu enamaphoyinti inkanyezi ikhampasi? Ake sicabangele isici esisodwa samuntu.

Dweba indilinga. Ukulinganisa ubukhulu nombusi. We khiqiza izinyathelo ezilula zezibalo: siphindaphindeka ububanzi we umbuthano yi isici 0,58779. Umphumela - adingekayo ubude kuzithinta (emgceni locondzile yokuxhuma amaphuzu amabili emgqeni ijika, njengoba uma yethu - umbuthano), esingavika uhlukanise umbuthano ibe izingxenye 5 alinganayo.

Ngokwesibonelo, ububanzi we umbuthano ilingana 7 cm. Phindaphinda 7 x 0.58779 = 4.11453, ahanjiswa okweshumi eliseduze (kusukela draw ingxenye yephepha akuyona ngaphezulu ubude ngqo kungenzeka) sithola 4.1 cm. Lona obuphelele wayefisa kuzithinta.

It uhlala ukuze ibenze futhi silungise imilenze ikhampasi kule value, futhi kungaba sebeziqhumbuza selilonke. Uma uxhuma kubo, uthola inkanyezi ezinhlanu olucijile.

Indlela ukudweba sibalo ngenye indlela? Cabanga samuntu 2.

Ukuze uqale, ukudweba pentagon njalo, alotshiwe umbuthano. Indlela ukudweba efanele inkanyezi emihlanu esiqondile kwesisekelo salo, kuboniswe ePhuzwini 2.

Dvweba indilinga ikhampasi. Ngokwemibandela uqoke ke njengoba O. isikhungo Iphuzu O ukudweba ngqo - ububanzi umbuthano yethu. Dweba engaba umbuthano ukuze perpendicular ubukhulu. engaba iphuzu ezimpambanweni zomgwaqo emjikelezweni okhonjiswe V On kwesokunxele iphuzu ubeke eceleni ibanga elilingana nengxenye ubude engaba kulo mbuthano, bonisa ukuthi iphuzu yayo A. Kusukela endaweni A ngokusebenzisa iphuzu V ukudweba umkhumbi enentambo ububanzi empambana (figure kuqokonyiswe abomvu) futhi uqoke yayo iphuzu B. VB ingxenye ubude obuphelele kuzithinta okungukuthi, ngayo nefunda ngayo selilonke ihlukaniswe yaba izingxenye 5 alinganayo. Kuyoba kuphela ukuxhuma amaphuzu idatha ngesimo inkanyezi.