Dab tsi yog qhov txawv ntawm ob thiab peb qhov geometric duab?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

A ob - qhov seem (2D) puab hasonly ob ntsuas, xws li qhov ntev thiab qhov siab. Ib square, daim duab peb sab, thiab lub voj voog yog tag nrho cov piv txwv ntawm 2D puab . Txawm li cas los xij, a peb - qhov seem ( 3D ) puab muaj peb ntsuas, xws li ntev, dav, thiab qhov siab.

Tsis tas li ntawd, dab tsi yog cov yam ntxwv ntawm peb qhov duab?

Hauv geometry, a peb - qhov loj me canbe txhais tau tias yog ib qho khoom daim duab los yog ib yam khoom los yog puab uas muaj peb qhov ntev - ntev, dav thiab qhov siab. Tsis zoo li ob- cov duab puab , peb - cov duab puab muaj thickness los yog tob. Theattributes ntawm a peb - daim duab yog lub ntsej muag, ntug thiab vertices.

Tsis tas li ntawd, yog ib tug kheej kheej 2d lossis 3d duab? ρα-sphaira, "lub ntiaj teb, pob") yog qhov zoo tshaj plaws puag ncig geometrical khoom nyob rau hauv peb-dimensional qhov chaw uas yog qhov saum npoo ntawm lub pob tag nrho (viz., piv rau cov khoom ncig hauv ob qhov ntev, qhov "lub voj voog" circumscribesits "disk").

Xav txog qhov no, qhov zoo li 3 seem zoo li cas?

Ob Qhov ntev : Ib lub dav hlau tiaj tus los yog puab yog- qhov seem . Peb Dimensions : Cov khoom nyob ib ncig ntawm koj - cov uas koj ua tau nqa, kov, thiab txav mus ncig- yog peb - qhov seem . Cov no cov duab muaj peb qhov ntev : qhov tob. Cubes, prisms, pyramids, spheres, cones, thiab thooj voos kheej kheej yog tag nrho cov piv txwv ntawm peb - qhov seem khoom.

Dab tsi yog qhov 3-dimensional shape hu ua?

Ib ob- qhov loj me muaj qhov ntev thiab dav. A peb - qhov seem khov kho puab kuj muaj qhov tob. Cov nplooj ntawv no npog ob qho tib si ncaj nraim hu ua polyhedrons, uas yog raws li cov polygons, thiab cov khib nyiab nrog nkhaus, xws li lub ntiaj teb, lub tog raj kheej thiab cov cones.