Thina ukubala indawo ebhokisini

Of ezininzi kuThixo iimilo zejiyometri enye ilula ukuze parallelepiped okhankanywe. Kuye ke imilo bemilo ogama isiseko kuyinto parallelogram. Asinto kunzima ukubala indawo bhokisi, kuba ifomula ilula kakhulu.

Prism wenze ubuso, eziphezulu kunye nokuphela kwegqabi. Ukusasazwa yezi zinto abasemthethweni lanelisekile ukuba loo mali isezantsi eyimfuneko ukuze kwakhiwe kwimilo yemigca. Parallelepiped iqulethe ubuso 6, leyo idityaniswe eziphezulu 8 iimbambo-12. Kwaye kwicala elijongene ibhokisi kuya kusoloko alingane. Ngoko ke, ukuze bafumane indawo bhokisi, kwanele ukuba ukujonga ubungakanani ubuso balo abathathu.

Parallelepiped (eli gama lithetha "ubuso ukufana" ngolwimi ngesiGrike) iye iipropati ezithile ezinokuthi akhankanywe. Okokuqala, lo wolingano lo mzobo kuqinisekisiwe kuphela phakathi nganye idayagonali yayo. Okwesibini, ukuba phakathi nayiphi na eziphezulu yayo malunga oxwesileyo, kunokwenzeka ukuba bangabhaqa ukuba zonke iindawo zibe kwindawo enye itekisi. Kananjalo kubalulekile ukuba siqaphele ukuba ipropati ukuba ubuso malunga zisoloko kwaye kunyanzelekile ukuba babe ngaxeshanye omnye komnye.

Kwindalo, ezi iintlobo parallelepipeds avelele:

• eziziingxande - liphethe ebusweni kwemilo yoxande;

• ngqo - uye kuphela ubuso ecaleni koxande;

• parallelepiped elibhalwe ngokumileyo yinxalenye yale ubuso icala, ezo zinikelwe ngezizathu ezingezizo nkqo;

• Cube - iquka lwe ngcambu-ezimile ubuso.

Makhe zama ukufumana indawo ibhokisi mzekelo uhlobo uxande semilo. Njengoko sele uyazi, bonke ubuso buxande. Kwaye ngenxa yokuba ncinane kwemali yezi zinto liye lancitshiswa ezintandathu, ngoko ukufumana indawo kobuso nganye, kufuneka ukuba azihlanganisele ukufumana iziphumo nenombolo eyodwa. Kwaye ukuze ufumane indawo nganye kuzo ayikho nzima. Ukuze wenze oku, wabandisa emacaleni aso omabini uxande.

Kusetyenziswe ifomula zezibalo ukumisela kummandla cuboid. Luquka abalinganiswa eziphawuleka kakhulu ebonisa indawo ubuso, yaye imi ngolu hlobo lulandelayo: S = 2 (ab + bc + AC), apho S - indawo mzobo, a, b - ecaleni isiseko, c - kumda osecaleni.

Siya kunika ubalo rough. Zicingele, a = 20 cm, b = 16 cm, c = 10 cm ngoku kuyimfuneko ukuba phinda amanani ngokungqinelana kunye nefomula :. 20 * 16 + 16 + 10 + 20 + 10 kwaye ufumane inani 680 cm2. Kodwa kuya kuba sisiqingatha kuphela mzobo, njengoko sele sifundile uze ushwankathele ubuso ezintathu square. Ekubeni ubuso ngayinye inemisebenzi "double", ukuba phinda ixabiso onesiphumo, uze ufumane indawo ibhokisi elingana 1360 cm 2.

Ukubala indawo umphezulu osecaleni, sebenzisa ifomula S = 2c (a + b). Ummandla isiseko ibhokisi ingafunyanwa phinda ubude emacaleni isiseko nganye enye.

Kubomi bemihla ngemihla, parallelepipeds zingafunyanwa rhoqo. Malunga ubukho babo kusikhumbuza shape izitena, idrowa ngomthi kwedesika yakhe, i bhokisi esiqhelekileyo. Imizekelo ngasinye ingafumaneka kwi ngobuninzi abasingqongileyo. Iinkqubo School geometry ekufundweni a izifundo ezimbalwa inikwe ibhokisi. Eyokuqala kwezi modeli zibonisa cuboid. Emva koko bonisa abafundi ukuba bangene njani kuwo yibhola okanye iphiramidi, amanye amanani, ukufumana indawo ebhokisini. Ngamafutshane, oku elula isafobe-ntathu.