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Video: Yuav ua li cas koj nrhiav tau qhov chaw ntawm ib tug geometric duab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov thaj chaw saum npoo ntawm ib daim duab khov yog cov sum ntawm sab nraud thaj chaw . Qhov no txhais tau tias koj yuav tsum nrhiav tus cheeb tsam ntawm tag nrho cov "pieces" uas ua rau lub cev muaj zog. Nrhiav tus cheeb tsam ntawm txhua qhov uas ua rau lub cev muaj zog, Tom qab ntawd ntxiv tag nrho cov thaj chaw ua ke kom tau tag nrho cheeb tsam ntawm UTSIDE ntawm lub geometric khov kho.
Nyob rau hauv kev hwm rau qhov no, dab tsi yog tus qauv rau cheeb tsam ntawm tag nrho cov duab?
Qhov yooj yim tshaj plaws cheeb tsam formula yog cov qauv rau cov cheeb tsam ntawm ib daim duab plaub. Muab ib daim duab plaub nrog ntev l thiab dav w, lub qauv rau cov cheeb tsam is: A = lw (rectangle). Ntawd yog, lub cheeb tsam ntawm daim duab plaub yog qhov ntev multiplied los ntawm qhov dav.
Tom qab ntawd, lo lus nug yog, dab tsi yog tus qauv rau kev nrhiav qhov chaw ntawm daim duab peb sab? Yuav nrhiav tau cheeb tsam ntawm a daim duab peb sab , muab lub hauv paus los ntawm qhov siab, thiab muab faib los ntawm 2. Kev faib los ntawm 2 los ntawm qhov tseeb tias ib qho parallelogram tuaj yeem muab faib ua 2 daim duab peb sab . Piv txwv li, nyob rau hauv daim duab mus rau sab laug, lub cheeb tsam ntawm txhua tus daim duab peb sab yog sib npaug rau ib nrab ntawm cheeb tsam ntawm parallelogram.
Hais txog qhov no, dab tsi yog tus qauv rau kev nrhiav qhov chaw ntawm lub tog raj kheej?
Txhawm rau nrhiav thaj chaw saum npoo ntawm lub tog raj kheej add cov thaj chaw saum npoo ntawm txhua qhov kawg ntxiv rau thaj chaw saum npoo ntawm sab. Txhua kawg yog ib lub voj voog ces tus thaj chaw saum npoo ntawm txhua qhov kawg yog π * r2, qhov twg r yog lub vojvoog ntawm qhov kawg. Muaj ob qhov kawg kom lawv sib xyaw thaj chaw saum npoo yog 2p*r2.
Yuav ua li cas koj nrhiav tau qhov chaw saum npoo thiab ntim ntawm ib tug zoo li cas?
Sphere Surface Area Formula thiab Sphere Volume Formula
- Luas = 4πr2
- Ntim = 4⁄3pab r3
- luas thaj tsam ntawm ib tug Prism = 2 × (Tej cheeb tsam ntawm lub hauv paus puab) + (Perimeter ntawm lub hauv paus puab) × (d)
- Volume of a Prism = (Area of base shape) × d.
- Luas = 2 (L × W) + 2 (L × D) + 2 (W × D)
- Ntim ntawm ib lub thawv = L × W × D.
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