Iintlobo zoonxantathu, ezimbombeni zaso kunye namacala

Mhlawumbi ngoyena esisiseko, ezilula umdla geometry yi unxantathu. Ekuhambeni kwisikolo samabanga aphakamileyo ukufunda iipropati yayo ephambili, kodwa ngamanye amaxesha ulwazi kwisifundo esenzelwa aziphelelanga. Types of triangles ekuqaleni ukugqiba iipropati zabo. Kodwa mbono kuhlala mixed. Ngoko ke thina uhlalutye okungakumbi ngayo.

Types of triangles zixhomekeke iqondo engile ngomlinganiselo. La manani ostro-, iqondile kwaye obtuse. Ukuba yonke engile musa ukudlula ixabiso degrees 90, eli nani linokuba ngokukhuselekileyo ngokuba bukhali. Ukuba ubuncinane enye kwikona nxantathu ngu 90, ngoko ke sisebenzisana ohlobo buxande. Ngenxa yoko, kuzo zonke ezinye iimeko phantsi ingqalelo imilo zejiyometri ebizwa obtuse.

Kukho iingxaki ezininzi ohlobo yondele-engile egqithe. Olona phawu lokwahlula na indawo iingongoma lwangaphakathi yonqumlo bisectors, medians kunye eziphakamileyo. Kwezinye iimeko, le meko enganeliswa. Ukumisela uhlobo 'nxantathu "mzobo ayikho nzima. Kwanele ukwazi, umzekelo, i cosine ye engile nganye. Ukuba naliphi na ixabiso elingaphantsi kwama-zero, ngoko ke unxantathu zombini ezi meko, into obtuse. Kwimeko ka-zero mzobo Isalathisi a unalo esinekona sasekunene. Onke amaxabiso alungayo baqinisekiswa ukuba likwenze ukuba phambi kokuba abe nembono yondele-engile egqithe.

Asikwazi athi malunga unxantathu ekunene. Likwimo kakhulu ogqibeleleyo, apho zonke kuhlangana ngongoma elifanayo medians, bisectors kunye ezise. Le embindini wesangqa sibhalwe kwaye kananjalo kuchazwe kwi ndawo enye. Ukusombulula iingxaki ekufuneka uyazi icala elinye kuphela, njengokuba ekuqaleni ukucwangcisa engile, kwaye aziwa elinye macala mabini. Yiloo nto ke inani yi parameter enye kuphela. Kukho oonxantathu isosceles. main osemqoka yabo - yokulingana macala mabini-engile esisekweni.

Maxa wambi kukho umbuzo malunga nokuba kukho unxantathu macala anikiweyo. Enyanisweni, uyacelwa ukuba le nkcazelo ingqamana iintlobo ezisisiseko. Umzekelo, ukuba isiphumo macala mabini lingaphantsi kwe wesithathu, eneneni, ngokomzekeliso onjalo ayisekho kwaphela. Ukuba umsebenzi bacelwa ukuba ukufumana cosines-engile kanxantathu onamacala 3,5,9, kukho iqhinga ecacileyo. Oku zichazwe ngaphandle iindlela ezintsonkothileyo zezibalo. Masithi ufuna ukufumana ukusuka kwindawo A ukuze abonise B. Umgama kumgca othe ngqo ngumgama oziikhilomitha 9. Noko ke, wena Uyakhunjuzwa ukuba kufuneka uye kwindawo C ukuya evenkileni. Umgama ukusuka ku A ukuya ku C 'ulingana ukude kangangeekhilomitha ezintathu, kwaye ukusuka C B - 5. Ngoko ifunyenwe ukuba, lihambe ivenkile, uya kudlula sekhilomitha ngaphantsi kwesinye. Kodwa ekubeni le ngongoma C ayikho kwi ngqo kumgca AB, ngoko kufuneka uhambe umgama engaphezulu. Apha kukho yintswela. Kakade ke, ingcaciso oluqhelekileyo. Math ayiyazi enye indlela ukubonisa ukuba zonke iintlobo oonxantathu kuxhomekeke iinkcukacha ezisisiseko. Uyatsho ukuba inani macala mabini ngaphezu ubude wesithathu.

Naluphi na uhlobo na le mihlaba ilandelayo:

1) Xa zidityanisiwe ezi engile ilingana degrees 180.

2) Kukho kusoloko orthocenter - ingongoma ekudibaneni kwe-ezise ezintathu.

3) Zonke ezintathu udibaniso avela kwi enekona le engile wezasekhaya yendlela yokwenza imigca iwela kwindawo enye.

4) malunga nayiphi unxantathu ingachazwa kwisangqa. Unako kwakhona ukungena isangqa kangangokuba waba amanqaku amathathu kuphela ukudibana akayi phandle.

ngoku baqhelene ne iimpawu ezingundoqo, banayo iintlobo ezahlukeneyo zoonxantathu. Kwixesha elizayo, kubalulekile ukuqonda ukuba yintoni ojongene nayo isicombululo kule ngxaki.