Video: Lub ntsej muag yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv khov kho geometry, ib ntsej muag yog lub tiaj (planar) nto uas tsim ib feem ntawm ciam teb ntawm a khov kho khoom; peb-dimensional khov kho bounded nkaus xwb los ntawm ntsej muag yog polyhedron.
Xav txog qhov no, lub ntsej muag ntawm lub ntsej muag yog dab tsi?
A ntsej muag yog 2d puab uas ua rau ib qhov chaw ntawm 3D puab , ib ntug yog qhov twg ob ntsej muag sib ntsib thiab lub vertex yog qhov taw tes lossis kaum ntawm lub geometric puab.
Tsis tas li ntawd, lub ntsej muag yog dab tsi? Vertices, Ntug thiab ntsej muag . Ib lub vertex yog kaum. Ib ntug yog ib txoj kab nruab nrab ntawm ntsej muag . A ntsej muag yog ib qho chaw tiaj tus.
Ua kom pom qhov no, cov npoo ntawm cov khoom yog dab tsi?
Vertices, Ntug , thiab Faces of a Khoom . Lub ntsej muag sib ntsib hauv cov kab ncaj hu ua ntug thiab cov ntsiab lus hu ua vertices. Ntug - Cov kab ntu uas tsim cov pob txha ntawm cov duab 3D yog hu ua ntug . Lub ntsej muag - Cov chaw tiaj tus nyob nrog ntug hu ua ntsej muag. Ib face a khov kho cov duab yog dav hlau lossis 2d daim duab.
Ib lub ntsej muag muaj pes tsawg leeg?
Txhua daim duab zoo, tshwj tsis yog ib qho kheej kheej, muaj ib lossis ntau lub ntsej muag, lossis cov chaw tiaj tus. Cia peb saib ib qho piv txwv. Daim duab saum toj no muaj lub ntsej muag nyob rau hauv qab, hu ua lub hauv paus, thiab lwm yam nyob rau sab saum toj. Nws muaj plaub lub ntsej muag nyob ib ncig ntawm ob sab.
Pom zoo:
Dab tsi yog 8 lub ntsej muag ntawm octahedron?
Nyob rau hauv geometry, ib tug octahedron (plural: octahedra) yog ib tug polyhedron nrog yim lub ntsej muag, kaum ob ntug, thiab rau vertices. Lo lus feem ntau yog siv los xa mus rau qhov tsis tu ncua octahedron, Platonic cov khoom tsim los ntawm yim daim duab peb sab sib npaug, plaub qhov sib ntsib ntawm txhua qhov vertex
Saturn lub ntsej muag yog dab tsi?
Cov qauv thiab Surface Saturn yog cov roj loj zoo li Jupiter. Nws feem ntau yog ua los ntawm hydrogen thiab helium. Saturn muaj huab cua tuab. Saturn muaj qhov zoo nkauj ntawm xya lub ntsiab nplhaib nrog qhov chaw nruab nrab ntawm lawv
Lub ntsej muag zoo li cas muaj 5 lub ntsej muag?
Hauv geometry, pentahedron (plural: pentahedra) yog polyhedron nrog tsib lub ntsej muag lossis sab. Tsis muaj lub ntsej muag-transitive polyhedra nrog tsib sab thiab muaj ob hom topological txawv. Nrog lub ntsej muag polygon tsis tu ncua, ob daim ntawv topological yog cov square pyramid thiab triangular prism
Dab tsi yog qhov flux los ntawm ib lub ntsej muag ntawm lub voos xwmfab?
Teb thiab piav qhia: Cov hluav taws xob flux los ntawm ib sab ntawm ib lub voos xwmfab vim yog tus nqi taw tes yog & rho tawm; 32000 V ⋅ m − 32 000 V ⋅ m
Koj pom thaj tsam ntawm lub ntsej muag siv lub ntsej muag li cas?
Qhov chaw saum npoo yog qhov sib npaug ntawm thaj chaw ntawm txhua lub ntsej muag (lossis qhov chaw) ntawm 3D duab. Ib lub cuboid muaj 6 lub ntsej muag. Txhawm rau nrhiav thaj chaw saum npoo ntawm lub cuboid, ntxiv cov cheeb tsam ntawm tag nrho 6 lub ntsej muag. Peb tseem tuaj yeem sau qhov ntev (l), dav (w), thiab qhov siab (h) ntawm lub prism thiab siv cov qauv, SA = 2lw + 2lh + 2hw, txhawm rau nrhiav thaj chaw saum npoo