Nyob ntawm lub hauv paus ntawm lub cev ntawm lub cev - cov yeeb yam dag pw, thiab txhua sab ntawm lub ntsej muag - qhov sib luag. Lub uninitiated, tej zaum ib tug me ntsis ntshai. Tab sis yog tias koj tus me nyuam raug hais kom tuaj rau zaj lus qhia nrog ib qho khoom plig, koj yeej xav pab nws thiab piav qhia txog kev yuav ua li cas.
Cia peb pib nrog cov khoom tsim tawm ncaj nraim. Nyob rau hauv no prism lub lateral ribs yog perpendicular mus rau hauv paus. Qhov yooj yim tshaj plaws yog los ntawm koj tus kheej lub ntsej muag ib daim ntawv ua tau nrog peb lub ntsej muag, txij li thaum nyob hauv nws cov hauv paus dag qhov nyuaj ntawm cov duab - cov vaj tse peb tog. Peb yuav ua rau "txoj cai" muaj txoj cai. Nws cov hauv paus yog sawv cev ntawm equilateral triangles.
Daim phiaj muaj peb sab
Peb yuav txiav txim siab seb qhov siab peb daim duab thij voos yuav ua tau ntawm ntawv. Kos ib daim duab uas muaj ib sab sib npaug zos rau qhov siab thiab sib npaug sib npaug ntawm qhov ntev ntawm txoj kab ntawm daim duab peb sab hauv qab. Tus duab plaub sib luag yog faib los ntawm txoj kab ncaj nraim rau hauv peb qhov chaw sib npaug. Los ntawm cov ces kaum ntawm qhov duab plaub hau, nruab nrab ntawm lub voj voog uas muaj sib npaug sib npaug ntawm peb tog peb sab hauv qab. Qhov twg lub voj voog tshaj qhov qub duab, peb muab cov ntsiab lus thiab txuas mus rau cov chaw hauv cov voj voog. Peb yuav tsum tau txais daim duab pom hauv nruab nrab ntawm daim duab.
Nyob rau daim ntawv pov thawj dab tsi ntawm daim ntawv plaub nrog plaub lub ntsej muag yog tsim, daim duab hauv daim duab qhia tau hais tias.
Hexagonal yam tshuaj
Ib qho piv txwv ntawm ib daim ntawv dawb pentahedral prism yog muaj nyob hauv daim duab.
Inclined prism
Daim ntawv pov thawj cov ntawv xov xwm muaj nyob rau hauv daim duab no.