Indlela ukubala ubukhulu wesangqa?

Kuba Okokuqala, makhe sibone ukuba yintoni esangqeni yaye kwahluke njani kwisangqa. Thatha usiba okanye ipensile kunye nepeyinti ebomvu kwiphetshana isangqa rhoqo. Peyinta yonke phakathi onesiphumo mzobo in blue ipensile. Red lesishwankathelo ebonisa umda imilo - isangqa. Kodwa imixholo ngaphakathi oluhlaza - kwaye kukho isangqa.

Imilinganiselo wesangqa kunye ubudeki isangqa uzimisele. On line obomvu ophawula isangqa, phawula iingongoma ezimbini ukwenzela ukuba isipili imifanekiso omnye komnye. Ukumatanisa kubo line. Ingxenye kudlula ekupheleni embindini wesangqa. Esi sigaba ohlanganisa iindawo malunga wesangqa, yaye kuthiwa geometry ubukhulu.

Yeengcandelo ehamba ngawo embindini wesangqa, kodwa zidibana kunye kwiincam kuthiwa kuvuka. Ngenxa yoko, Isingqi ubaleka kwindawo embindini wesangqa, yaye ububanzi bayo.

ububanzi luchazwa ileta Latin D. Ukufumana netoti wesangqa unokuba amaxabiso ezifana ndawo, ubude kunye owela ngaphakathi kwama-isangqa.

Umgama ukusuka kwindawo embindini ukuya kwindawo la manani achazwe ilibele, ekuthiwa radius kwaye liboniswe kwileta R. Ulwazi kwirediyasi netoti wesangqa kunceda olunokubalwa isenzo elula:

D = 2 * R

. Umzekelo, embindini - 7 cm 7 cm phinda ngo-2 yaye afumane ixabiso ngokulinganayo 14 cm A: D silingana isafobe kwangaphambili-14 cm ..

Maxa wambi kuyimfuneko ukumisela netoti isangqa ecaleni ubude bayo. Apha kuyimfuneko ukuba usebenzise indlela eyodwa endincedayo ukugqiba la manani achazwe apha. Equation 2 L = Pi * R, apho 2 - lixabiso rhoqo (rhoqo), nasePibhesete = 3.14. Yaye ekubeni yinto eyaziwayo ukuba R = D * 2, ngoko ifomula angamelwa kwenye indlela

L = Pi * D

D = L / Pi

Eli binzana kusebenza le ubudeki circle ifomula. Kufakwe ixabiso eyaziwa kwi ingxaki ekusombululeni inxaki kunye esingaziwayo mnye. Thelekelela ubude m 7 Ngenxa yoko .:

D = 7/3, 14

D = 21, 98

A: ubukhulu kweemitha 21,98.

Ukuba ixabiso le ndawo yaziwa, kunokwenzeka kwakhona ukufumanisa ubukhulu wesangqa. Ifomula esetyenziswa kule meko ngolu hlobo lulandelayo:

D = 2 * (S / PI) * (1/2)

S - kule meko mmandla mzobo. Umzekelo, kwi umsebenzi ke ilingana no-30 square metres. M. Siya:

D = 2 * (30/3, 14) * (1/2) D = 9 55414

Xa umsebenzi okhethwe ubukhulu elingana umthamo (V) kwebhola, le fomyula ilandelayo ukufumana ubukhulu: D = (6 V / PI) * 1/3.

Ngamanye amaxesha kufuneka ufumane netoti kwisangqa abhaliwe unxantathu. Ukulungiselela le njongo, ngokomgaqo wokubala welo Isangqa radius yokufumana:

R = S / p (S - ummandla igqitywe phambili yendlela olwakho nxantathu, kunye p - kujikelezo lahlulwe ngo-2).

Isiphumo kabini, ucinga ukuba D = 2 * R.

Amaxesha amaninzi ukufumana isangqa ubukhulu yaye ekhaya. Ngokomzekelo, xa kujongwa ubungakanani lo msesane, leyo kulingana ubukhulu bayo. Ukuze wenze oku, yisongele ngomnwe ibe umnini ring intambo. Phawula amanqaku of zoqhagamshelwano emancamini omabini obengo. Linganisa ubude umgca ukusuka kwindawo ukuba aveze. Ixabiso engumphumela liphindaphindwe 3.14, ngokulandela indlela yokuqingqa netoti kubude eyaziwa. Ngoko ke, ibinzana elithi ulwazi geometry algebra ebomini ayiloncedo, azisoloko abufani yokwenene. Kwaye isizathu esinzulu ukuthatha uxanduva ngakumbi izifundo zesikolo.