Indlela yokubala indawo uxande: amacebiso aluncedo

Enye indlela yokuqala, nto leyo ifundwa kwimathematika kukuba ukubala ngendlela ummandla uxande. Kwakhona wasebenzisa kakhulu qho. imiphezulu buxande ngeenxa zonke kuthi, ngoko ke kuyimfuneko rhoqo ukuze ukwazi indawo yabo. Ukuba kuphela ukufumana phandle apho kuya kubakho ngokwaneleyo kufumaneka phambi ipeyinti ukuba imigangatho ukupeyinta.

Zeziphi iiyunithi ndawo zikhona?

Ukuba sithethe lowo kwamkele ngamazwe, kuya kuba square metre. Oku kuluncedo xa kubalwa indawo eludongeni, isilingi okanye umgangatho. Zibonisa indawo kwezindlu.

Xa kuziwa izinto ezincinci, faka decimeters isikwere, cm okanye iimilimitha. kuyimfuneko yakutshanje, ukuba nani akukho ngaphezu kozipho.

Xa ukulinganisa indawo isixeko okanye ilizwe zezona ezikwere zeekhilomitha kakhulu efanelekileyo. Kodwa kukho kwakhona lasi ezisetyenziswa ukuba ukhankanye ubungakanani ndawo: AP kunye hectare. Eyokuqala kwezi nayo ibizwa aziluki.

Kuthekani ukuba isethi uxande?

Le yindlela elula ukubala njani na indawo yoxande. Simply phinda ubungakanani ezimbini eyaziwa: ubude nobubanzi. Ifomula sijongeka njengoku: S = A * B. Apha oonobumba A and B alathelwe ubude nobubanzi.

Ngokufanayo, ukuba zibalwa indawo yembutho, nto leyo Eyonanto ibalulekileyo yoxande. Ekubeni anayo macala onke alinganayo, ngoko imveliso uba incwadi isikwere.

Kuthekani ukuba inani kuboniswe ephepheni grafu?

Kule meko kuyimfuneko ungenakuxhomekeka inani leseli ngaphakathi imilo. Xa inani labo nje ukubala kummandla uxande. Kodwa oku kungenziwa xa emacaleni xande ungqamane imigca iseli.

Idla lusinika isikhundla uxande apho emacaleni aso nabavumayo ngokuphathelele razlinovke kwephepha. Emva koko, inani iseli kunzima ukumisela, ngoko ke ubalo ngummandla elinzima uxande.

Wena kuqala kufuneka ufumane indawo uxande, nto leyo ukrwele kwiseli kanye kule. Yinto elula: phinda ubude nobubanzi. Ke amanani ngenxa ukuba sisuswe kummandla iyonke oonxantathu buxande. Kwaye abane kubo. Hi ndlela leyi, ebalwa yabo kwanesiqingatha imveliso emilenzeni.

Isiphumo sokugqibela kukunika ixabiso ummandla yoxande.

Kufuneka wenze ntoni, ukuba amaqela ayaziwa, kodwa wanikwa ubukhulu bayo kwaye engile phakathi idayagonali?

Ngaphambi yokufumana indlela kummandla uxande, kule meko kufuneka sibe ukubala isandla sakhe, ukuba uthathe ithuba kwifomula eziqhelekileyo. Ekuqaleni kufuneka ukuba ukukhumbula idayagonali impahla yakhe. Bayalingana kwaye wabelane ingongoma yonqumlo ezimbini. Oku kunokubonwa kumzobo ezisahlula kwikonw ngekona uxande ibe isosceles ezine oonxantathu ukuba ulingana omnye komnye.

amacala ngokulinganayo kanxantathu sichazwa nesiqingatha idiagonal, nto leyo eyaziwa. Oko kukuthi, kuzo zonke unxantathu inamacala amabini kwaye engile phakathi kwabo, anikwe kule ngxaki. Ungasebenzisa indlela theorem of cosines.

Elinye icala elide ibalwa ngokomgaqo wokubala apho bana amacala ngokulinganayo unxantathu, kwaye engile cosine kwangaphambili. Ukubala ixabiso lesibini kufuneka ukuba uthathe i cosine ye-engile 180 elingana umahluko kunye engile eyaziwa.

Ngoku ingxaki ukubala njani kummandla uxande, kuyehla kube phindo elula amaqela amabini ezifunyenweyo.

Kufuneka wenze ntoni xa enikwe kwibala kwi ingxaki?

Ngokuqhelekileyo, kule imeko ngayo yabonisa ratio kwaye ubude nobubanzi. Umbuzo of ukubala njani kummandla uxande, kule meko kuba lula a umzekelo.

Ukucinga ukuba ingxaki yomjikelezo cm yoxande-40. Kwakhona kwaziwa ukuba amaxesha ubude enye enesiqingatha ububanzi. Kufuneka wazi indawo yayo.

Isisombululo kule ngxaki iqala ungeniso kwebala ifomula. paint yayo elula njengoko isixa ubude nobubanzi, ngamnye iphinda ezimbini ngamnye. Oku equation wokuqala kwinkqubo ekufuneka ukuba iqwalaselwe.

Eyesibini kungenxa esaziwa ngayo aspect. Icala lokuqala, ngamanye ubude, kulingana imveliso yesibini (ububanzi) kunye nenani 1.5. Le equation kufuneka itshintshwe intlawulo kulo Ifomula lokubiyela.

Kubonakala ukuba ilingane isixa monomials ezimbini. Imvelaphi - 2 kunye nemveliso ububanzi ongaziwayo, okwesibini - imveliso yamanani-2 no-1.5 ububanzi efanayo. Kulo lenxaki, omnye unknown kuphela - ububanzi. Kuyimfuneko ukuba ukubala, uze usebenzise quadratic yesibini ukubala ubude. Kuyandisa kuphela la manani mabini ukufumana indawo yoxande.

Ubalo ukunika amaxabiso ezinjalo: ububanzi - 8 cm, ubude - 12 cm, kwaye ndawo - 96 cm ^2. Inani lokugqibela - impendulo le ngxaki.