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Video: Yuav ua li cas koj nrhiav tau qhov chaw saum npoo thiab ntim ntawm ib lub voj voog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov chaw saum npoo = (2 • π • r²) + (2 • π • r • height) Qhov twg (2 • π • r²) yog qhov thaj chaw saum npoo ntawm qhov "kawg" thiab (2 • π • r • qhov siab) yog lateral cheeb tsam (cov cheeb tsam ntawm "sab").
Ib yam li ntawd, tib neeg nug, dab tsi yog tus qauv rau thaj tsam ntawm lub voj voog?
Cov qauv rau cov thaj tsam ntawm ib lub voj voog yog A = π_r_2, qhov twg A cheeb tsam ntawm lub voj voog thiab r yog lub vojvoog ntawm lub lub voj voog.
Tsis tas li ntawd, koj yuav nrhiav tau qhov chaw saum npoo ntawm lub tshuab xam zauv lub voj voog li cas? Nrhiav tus cheeb tsam nrog qhov no cheeb tsam vajvoog formula: Multiply Pi (3.1416) with the square of the radius (r) 2. Lub vojvoog tuaj yeem yog qhov ntsuas qhov ntev. Qhov no xam cov cheeb tsam raws li square units ntawm qhov ntev siv nyob rau hauv lub vojvoog.
Ntxiv mus, dab tsi yog lub mis rau ntim thiab qhov chaw saum npoo?
Cov ntim ntawm ib lub prism yog muab nyob rau hauv ob kev sib npaug :V = ( cheeb tsam ntawm lub hauv paus) * (qhov siab) thiab V = (ntev) * (dav) * (qhov siab). Cov thaj chaw saum npoo ntawm ib lub prism yog qhov sum ntawm tus cheeb tsam ntawm nws rau lub ntsej muag: Qhov chaw saum npoo = 2_l_w + 2_w_h + 2_l_h.
Yuav ua li cas koj pom qhov chaw saum npoo thiab ntim ntawm ib lub tog raj kheej?
Tej yam uas yuav tsum nco ntsoov
- Luas cheeb tsam ntawm ib lub tog raj kheej = 2πr2 + 2 rh.
- Volume ntawm ib lub tog raj kheej = πr2h.
- Koj yuav tsum paub lub vojvoog thiab qhov siab txhawm rau txheeb xyuas qhov ntim thiab qhov chaw ntawm lub tog raj kheej.
- Cov lus teb rau cov teeb meem ntim yuav tsum yog nyob rau hauv cubic units.
- Cov lus teb rau cov teeb meem hauv cheeb tsam yuav tsum yog nyob rau hauv square units.
Pom zoo:
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Dab tsi yog qhov kev sib raug zoo ntawm thaj chaw saum npoo thiab ntim ntawm ib lub sphere?
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