Star-kwakubonisa Five. Indlela ukuwutsala ngokukhawuleza nangokulula

star-etsolo Five - umfuziselo iziqu zonke izizwe zehlabathi ngawo onke amaxesha. imifanekiso zayo zifumaneka kanye ekuqaleni impucuko, xa kukho aluzange yokubhala.

Umfanekiso kakhulu yokuqala inkwenkwezi-etsolo ezintlanu, Ndifunyenwe abembi, labhalwa emva kunyaka 3500 BC. It yathinjwa phezu icwecwe lodongwe, wafunyanwa ngexesha bemba isixeko yaseSamariya ka Uruk.

uphawu star lithandwa eYiputa yamandulo neBhabhiloni. Yena wayesoyikwa ngamaRoma amandulo, kwanakumaGrike, ngaphandle kokuba uphawu lwenkwenkwezi-etsolo ezintlanu zomjikelo wendalo. angles ezintlanu star kwanamaGrike ezinxulumene izakhi ezintlanu kuzo wadala ihlabathi lethu - umhlaba, amanzi, umoya, umlilo kunye kaEtere.

star-etsolo Five yi lophawu iibhatyi iingalo iindwe kwamazwe amaninzi mihla yaye ukho kwindawo enjalo emkhosini.

Kodwa ukuba eli nani gingxi ayikho lula njengokuba kusenokubonakala xa efika kuqala.

Indlela ukuba bazobe inkwenkwezi-etsolo ezintlanu, ngaphandle kokuphakamisa ipensile ukusuka iphepha

Enkulu sobulumko yamaGrike kunye yezibalo kaPythagoras ekuthiwa inkwenkwezi ezintlanu-etsolo wemfezeko zezibalo. Enyanisweni, eli nani linokuba nzima ukuba ukrwele umgca eyaphukileyo, ngaphandle kokuphakamisa ipensile ukusuka kuxwebhu bephepha abuyele ekupheleni ukuya kwindawo yokuqala enye, owaqala ukuzoba.

Nantsi ke, ezintsonkothileyo elula xa uqala, nani - inkwenkwezi-kwakubonisa ezintlanu. Indlela ukuba ukrwele umgca eyaphukileyo kuyacaca lomzobo.

Indlela ukuba bazobe inkwenkwezi, usebenzisa irula neprotrektha

Ngoku siza kufunda indlela esifanelekileyo inkwenkwezi-kwakubonisa ezintlanu. Of lezixhobo ezifunekayo umlawuli neprotrektha.

Ukuze ufumane ukuya inkwenkwezi, kuyimfuneko ukuba aqhube iinxalenye ubude alinganayo ukuze engile lwangaphakathi phakathi onke amanani ezintlanu eziphezulu wayelingana ° 36. Ukuziqhelisa, oku kwenziwa ngolu hlobo lulandelayo - itsalelwa kwi-engile 36 °, ukususela izahluko zayo ngaphezulu ubude alinganayo Wayilinganisa, kunye endpoints zabo eziqhutyelwa ngqo entsha-engile ° 36.

Kungenzeka kwakhona ukuba angaya ingxaki ngendlela eyahlukileyo kancinci ngokuzoba i alinganayo pentagon kunye eziphezulu-engile ka-106 °, uze wokujoyina iinxalenye ezimbombeni zaso malungana.

Ukuba uya kuhlala zonke iimeko, ekugqibeleni uza kufumana elihle inkwenkwezi-kwakubonisa ezintlanu. Indlela ukuwutsala, ngendlela elula, ufunde.

Indlela ukuba bazobe inkwenkwezi ngoncedo ikhampasi neprotrektha

Ngoku kufuneka ikhampasi neprotrektha. Ekubeni achazwe apha ka-360 °, ngoko 1/5 izahlulo - 72 ° (360: 5 = 72). Ukuya ekwakhiweni.

Zoba isangqa ikhampasi. Phawula indawo yokuqala kuwo - iinkwenkwezi phezulu embindini wesangqa. Thatha neprotrektha, beka phakathi kwayo kunye embindini wesangqa, kwaye yonke ubude achazwe apha uqaphele umngcipheko nkwenkwezi iincopho elizayo yonke ° 72.

Ixhume ukuba bahlale ngqo, uze ufumane esihle inkwenkwezi-kwakubonisa ezintlanu. Indlela ukuwutsala, ukuba ayikho isandla iya kuba neprotrektha? Ngaphandle kuyo, ungenza, kuya kufuneka kuphela umlawuli isixhobo kunye nekhampasi.

Indlela ukuba bazobe inkwenkwezi nomlawuli kunye ikhampasi

Indlela ukuba bazobe inkwenkwezi ikhampasi-kwakubonisa abahlanu? Cinga lwalo enye.

Zoba isangqa. Ukulinganisa ubukhulu kunye nomlawuli. Yokuvelisa amanyathelo zezibalo ezilula: phinda ubukhulu be wesangqa yi isici 0,58779. Isiphumo - ayimfuneko ubude Isingqi (umgca othe ngqo oqhagamshelanisa iingongoma ezimbini komgca curve, njengoko kwimeko yethu - isangqa), ngalo walhule isangqa ibe ngamalungu 5 alinganayo.

Umzekelo, i-sangqa wesangqa ilingana no-7 cm. Phinda-phinda 7 x 0.58779 = 4.11453, elingqukuviweyo weshumi elikufutshane (ukususela draw kwi kwicandelo iphepha ubude hayi ngaphezulu ngqo kunokwenzeka) sinokuyifumana 4.1 cm. Le ubude wacela Isingqi.

Kuhleli ibenze aze alungise imilenze ikhampasi ngalo eli xabiso, kwaye basike wedini. Xa udibanisa nabo, ufumana inkwenkwezi-kwakubonisa ezintlanu.

Indlela ukuba bazobe inani ngenye indlela? Cinga lwalo 2.

Okokuqala, uzobe pentagon rhoqo, abhaliwe kwisangqa. Indlela ukuba bazobe esifanelekileyo inkwenkwezi-etsolo ezintlanu endaweni yalo, ziboniswe kuMfanekiso 2.

Zoba isangqa ikhampasi. Ngokwemibandela Zimiseleni ngayo njengeziko O. A indawo O krwela ngqo - sangqa kwisangqa yethu. Zoba embindini wesangqa kangangokuba nkqo ukuba ubukhulu. kwirediyasi kwindawo yonqumlo kunye Isangqa zibonakaliswe yi V. On ekhohlo kwindawo ebekelwe bucala umgama olingana nesiqingatha ubude kwirediyasi kule folda, bonisa indawo A. yayo Ukusuka kwindawo A nge Indawo V ukuba bazobe isangqa ephethe ngesandla ulutya sangqa ekudibaneni (kulo mzobo ngayo kubalaseliswe obomvu) kunye ityumbe point B. yayo ubude VB icandelo ubude imisindo kukuthi, esebenzisa apho achazwe apha yahlulwe 5 alinganayo. Kuya kufuneka kuphela ukudibanisa amanqaku data kwi ngendlela inkwenkwezi.