Video: Koj pom thaj tsam ntawm lub ntsej muag siv lub ntsej muag li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov chaw saum npoo yog qhov sum ntawm thaj chaw ntawm tag nrho ntsej muag (los yog nto) ntawm 3D duab. Ib lub cuboid muaj 6 daim duab plaub ntsej muag . Yuav nrhiav tau thaj chaw saum npoo ntawm ib cuboid, ntxiv rau thaj chaw ntawm tag nrho 6 ntsej muag . Peb tuaj yeem sau qhov ntev (l), qhov dav (w), thiab qhov siab (h) ntawm qhov prism thiab siv the formula, SA=2lw+2lh+2hw, to find the thaj chaw saum npoo.
Yog li ntawd, koj yuav nrhiav tau qhov chaw ntawm lub ntsej muag li cas?
Cov lus teb raug: Cov cheeb tsam ntawm txhua tus ntsej muag yog pom los ntawm squaring qhov ntev ntawm sab. Multiply cheeb tsam ntawm ib ntsej muag los ntawm tus lej ntawm ntsej muag kom tau tag nrho saum npoo cheeb tsam o kub.
Ib yam li ntawd, thaj tsam ntawm tus kheej yog dab tsi? A kheej kheej nrog lub vojvoog r muaj qhov ntim ntawm 4 3 π r 3 frac {4}{3} pi r^3 34πr3 thiab qhov chaw cheeb tsam 4 π r 2 4 pi r^2 4πr2. A kheej kheej muaj ntau yam khoom nthuav dav, ib qho yog qhov, ntawm txhua daim duab nrog tib qhov chaw cheeb tsam , cov kheej kheej muaj qhov ntim loj tshaj plaws.
Yog li ntawd, dab tsi yog tus qauv rau kev nrhiav thaj chaw saum npoo ntawm lub kaum sab xis prism?
Cov formula los nrhiav thaj chaw saum npoo ntawm ib lub prism yog A = 2wl + 2lh + 2hw, qhov twg w yog qhov dav, l yog qhov ntev, thiab h yog qhov siab.
Yuav ua li cas yog tus qauv rau nrhiav thaj tsam ntawm ib lub voos xwmfab?
Nrhiav qhov chaw thaj tsam kub , siv cov qauv : nto cheeb tsam = 6s^2, qhov twg s yog qhov ntev ntawm ib sab. Yog tias koj tsis paub qhov ntev ntawm ob sab, koj tuaj yeem pom qhov chaw cheeb tsam siv ntim. Tsuas pom cov kub hauv paus ntawm lub ntim, uas yog sib npaug rau qhov ntev ntawm ib sab ntawm lub kub.
Pom zoo:
Yuav ua li cas koj pom thaj tsam ntawm oblique prism?
Cavalieri lub hauv paus ntsiab lus hais tias, qhov ntim ntawm oblique prism zoo ib yam li ntawm txoj cai prism nrog sib npaug puag thiab qhov siab. Cov cheeb tsam saum npoo tuaj yeem suav ua 2 * puag ncig + thaj chaw ntawm cov parallelograms. Sau lub kaum sab xis thiab sab ntev lossis qhov siab thiab lub hauv paus cheeb tsam lossis ntim
Yuav ua li cas koj pom thaj tsam ntawm daim duab hauv square units?
Thaj tsam yog ntsuas hauv 'square' units. Lub cheeb tsam ntawm daim duab yog tus naj npawb ntawm cov squares yuav tsum tau npog nws tag nrho, zoo li cov vuas rau hauv pem teb. Thaj tsam ntawm ib square = sab sij hawm sab. Txij li txhua sab ntawm ib lub square yog tib yam, nws tuaj yeem tsuas yog qhov ntev ntawm ib sab squared
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
Koj pom thaj tsam ntawm Monomial li cas?
Txhawm rau nrhiav thaj tsam ntawm lub xwmfab no, peb muab qhov ntev ntawm nws tus kheej, lossis square nws. Qhov chaw, 4x2, yog cov khoom ntawm tus lej (4) thiab qhov sib txawv nrog tus lej suav tag nrho (x2). Hauv lwm lo lus, nws yog monomial, ib yam nkaus. Yog li qhov tshwm sim ntawm kev sib faib ob monomial yog-lwm monomial
Yuav ua li cas koj pom thaj tsam ntawm lub pyramid siv lub vas?
VIDEO Hais txog qhov no, tag nrho thaj chaw ntawm lub pyramid yog dab tsi? Cov Qhov chaw ntawm lub Pyramid Thaum txhua sab ntsej muag zoo ib yam: [Paj Thaj chaw ] + 1 / 2 × Perimeter × [Slant Length] Ib tug kuj yuav nug, ua li cas koj nrhiav tau qhov chaw ntawm ib tug kheej kheej?