Qhov chaw hla ntawm ib lub tog raj kheej yog sib npaug rau thaj tsam ntawm ib lub voj voog yog txiav thaum uas tig mus rau lub voj voog puag ncig. Qhov chaw hla ntu yog thaj tsam ntawm ob sab ntawm cov duab uas tau txais thaum cov khoom peb-seem - xws li lub tog raj kheej - yog hlais perpendicular rau qee qhov axis ntawm ib qho chaw.
Ib yam li ntawd, tus qauv rau cheeb tsam cross-sectional yog dab tsi? Kev txiav txim siab ntawm cheeb tsam los ntawm squaring lub vojvoog thiab ces muab faib los ntawm 3.14. Piv txwv li, yog tias tsob ntoo ntsuas li 10u201d DBH, lub vojvoog yog 5u201d. Muab 5 los ntawm 5 sib npaug 25, uas thaum muab 3.14 sib npaug 78.5. Yog li, qhov chaw hla ntawm ib tsob ntoo 10u201d DBH yog 78.5.
Cov mis hauv cheeb tsam yog dab tsi? Muab lub duab plaub nrog ntev l thiab dav w, cov qauv rau thaj tsam yog: A = lw (duab plaub). Ntawd yog, thaj tsam ntawm lub duab plaub yog qhov ntev sib npaug los ntawm qhov dav. Raws li qhov xwm txheej tshwj xeeb, raws li l = w hauv qhov xwm txheej, thaj tsam ntawm ib lub xwmfab nrog sab ntev s tau muab los ntawm tus qauv: A = s2 (xwmfab).
Koj ua li cas thiaj daws tau cov seem?
Thib ob Koj siv cov qauv hauv cheeb tsam li cas?
Lub ntim ntawm lub tog raj kheej no yog dab tsi?
Cov mis rau ntim ntawm lub tog raj kheej yog V = Peb lub V = π r2h. Lub vojvoog ntawm lub tog raj kheej yog 8 cm thiab qhov siab yog 15 cm. Hloov 8 rau r thiab 15 rau h hauv cov qauv V = πr2h . Ua kom yooj yim.
ces Qhov formula thiab piv txwv yog dab tsi? Cheeb Tsam Formula
Piv txwv li, yog tias koj xav paub thaj tsam ntawm lub thawv square nrog sab 40 cm, koj yuav siv cov qauv: Thaj tsam ntawm Square = a2, qhov twg a yog sab ntawm lub square. Ib yam li ntawd, thaj tsam ntawm daim duab peb sab kuj tuaj yeem pom siv nws cov qauv Area (1/2 × b × h).
Yuav ua li cas koj xam qhov hla ntu ntu ntim ntim? Txhawm rau xam qhov ntim ntawm lub tog raj kheej, ces, peb yooj yim muab cov cheeb tsam ntawm tus ntoo khaub lig los ntawm qhov siab ntawm lub tog raj kheej: V = A⋅h. Nyob rau hauv cov ntaub ntawv ntawm txoj cai ncig lub tog raj kheej (kua zaub tau), qhov no ua V = πr2h. Daim duab 1.1. 1: Txhua ntu ntu ntawm ib lub tog raj kheej tshwj xeeb yog zoo ib yam rau lwm tus.
Yuav ua li cas koj thiaj nrhiav tau qhov ntim hla ntu?
Lub ntim los ntawm txoj kev hla ntu siv thaj tsam ntawm tag nrho cov hlais ntawm cov duab thiab ntxiv lawv ua ke kom pom tag nrho cov ntim. Rau ob daim duab, yog tias cov kab sib txuas muaj thaj tsam tib yam ces cov lej yuav zoo ib yam thiab cov duab yuav muaj tib lub ntim.
Dab tsi yog qhov cross section hauv lej? Ib qho hlais yog ib seem dav hlau uas yog ib seem ntawm peb-dimensional khoom uas yog parallel rau ib qho ntawm nws cov dav hlau ntawm symmetry los yog perpendicular rau ib qho ntawm nws cov kab ntawm symmetry. Piav qhia cov duab uas tsim los ntawm ntu ntu (square, rectangle, triangle, thiab lwm yam).
Qhov piv txwv hauv cheeb tsam yog dab tsi?
Cheeb Tsam yog dab tsi?
Lub npe ntawm cov duab: | Cov Qauv Hauv Cheeb Tsam: |
---|---|
daim duab peb sab | Thaj tsam = bh, qhov twg b yog lub hauv paus, Thiab h yog qhov siab. |
square | Luas = l × l, qhov twg l yog qhov ntev ntawm txhua sab. |
duab plaub | Luas = l × w, qhov twg l yog qhov ntev thiab w yog qhov dav. |
Parallelogram | Cheeb Tsam = b × h, qhov twg b yog lub hauv paus, thiab h yog qhov siab sib npaug |
Qhov kev daws ntawm cheeb tsam yog dab tsi? Thaj tsam yog ntsuas hauv square units xws li square inches, square feet los yog square meters. Txhawm rau nrhiav thaj tsam ntawm ib lub duab plaub, muab qhov ntev ntawm qhov dav. Cov mis yog: A = L * W qhov twg A yog thaj tsam, L yog qhov ntev, W yog qhov dav, thiab * txhais tau tias sib npaug.
Thaj av ntsuas cheeb tsam li cas?
kom luv), txiav txim siab qhov ntev thiab dav ntawm thaj chaw koj tab tom ua haujlwm nrog, ntsuas hauv ko taw. Muab qhov ntev los ntawm qhov dav thiab koj yuav muaj cov square feet. Nov yog cov qauv yooj yim uas koj tuaj yeem ua raws: Ntev (hauv ko taw) x dav (hauv ko taw) = thaj tsam hauv sq.
Qhov chaw ntawm lub tog raj kheej yog dab tsi?
Lub tog raj kheej lub ntim yog π r² h, thiab nws thaj tsam yog 2π rh + 2π r².
Yuav ua li cas koj pom thaj tsam ntawm lub tog raj kheej? Cov mis los xam tag nrho cheeb tsam ntawm ib lub tog raj kheej yog muab raws li, tag nrho cov cheeb tsam ntawm lub tog raj kheej = 2 π r(h + r), thaum lub cheeb tsam nkhaus ntawm lub tog raj kheej yog, nkhaus/sab hauv cheeb tsam ntawm lub tog raj kheej = 2πrh, qhov twg 'r' yog lub vojvoog ntawm lub hauv paus thiab 'h' yog qhov siab ntawm lub tog raj kheej.
Vim li cas cov mis rau ntim ntawm ib lub tog raj kheej? Yog li, qhov ntim ntawm lub tog raj kheej tuaj yeem muab los ntawm cov khoom ntawm thaj tsam ntawm lub hauv paus thiab qhov siab. Rau ib lub tog raj kheej nrog lub hauv paus vojvoog 'r', thiab qhov siab 'h', qhov ntim yuav yog lub hauv paus lub sij hawm qhov siab. Yog li ntawd, lub ntim ntawm ib lub tog raj kheej = π r2h kub.
Kuv yuav xam thaj tsam ntawm ib lub voj voog li cas?
Cov qauv rau thaj tsam ntawm ib lub voj voog yog A = pi * r * r qhov twg r yog lub vojvoog (inch / 2).
Koj nrhiav tau thaj tsam li cas hauv qib 4 lej?
Puas yog qhov chaw hla ntu tib yam li ntim?
Muab cov khoom tsis txaus ntseeg, peb tuaj yeem kwv yees nws qhov ntim los ntawm kev txiav nws rau hauv n nyias slices. Thaum cov hlais nyias nyias, txhua daim hlais tuaj yeem kwv yees tau zoo los ntawm txoj cai lub tog raj kheej. Yog li Qhov ntim ntawm txhua daim yog kwv yees li nws qhov chaw hla ntu × thickness.
Cov mis ntim yog dab tsi? Whereas cov qauv yooj yim rau thaj tsam ntawm cov duab plaub yog ntev × dav, cov qauv yooj yim rau ntim yog ntev × dav × qhov siab.
Dab tsi yog daim duab kos duab?
Hla ntu, lossis ntu, raws li lawv feem ntau hu ua, yog architectural drawings uas yog orthographic projections ntawm cov qauv nrog ib tug txiav transecting lawv. Hom kev projection no qhia txog kev kos duab peb-dimensional hauv ob-dimensional saib.
Cov duab dab tsi yog cov ntu ntu ntawm lub tog raj kheej? Qhov hla ntawm lub tog raj kheej yog ib lub voj voog.
Kev faib cheeb tsam yog dab tsi?
Kev sib npaug ntawm a 1 tus lej siv cov qauv hauv cheeb tsam
Qhia qhov teeb meem raws li thaj tsam ntawm ib lub duab plaub, thiab tom qab ntawd tawg cov duab plaub ntawd rau hauv cov chunks me kom daws tau yooj yim dua. Txoj kev no tseem hu ua box multiplication.
Koj pom thaj tsam li cas nrog 3 tus lej?