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Video: Qhov chaw ntawm daim duab yog dab tsi?
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 txhua lub ntsej muag (lossis nto) ntawm 3D puab . Ib lub cuboid muaj 6 lub ntsej muag. Yuav nrhiav tau thaj chaw saum npoo ntawm ib cuboid, ntxiv rau thaj chaw 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 tus qauv, SA = 2lw + 2lh + 2hw, los nrhiav qhov thaj chaw saum npoo.
Tsis tas li lo lus nug yog, koj ua li cas nrhiav thaj chaw saum npoo ntawm daim duab?
Yuav ua li cas nrhiav thaj tsam ntawm Rectangular Prisms:
- Nrhiav thaj tsam ntawm ob sab (Length * Qhov siab) * 2 sab.
- Nrhiav thaj tsam ntawm sab uas nyob ib sab (Dav * Qhov siab) * 2 sab.
- Nrhiav thaj tsam ntawm qhov kawg (Length * Dav) * 2 kawg.
- Ntxiv peb qhov chaw ua ke kom pom thaj chaw saum npoo av.
- Piv txwv li: Qhov chaw saum npoo ntawm ib daim duab plaub prism 5 cm ntev, 3 cm.
Ib tug kuj yuav nug, qhov chaw saum npoo ntawm lej txhais li cas? Qhov chaw saum npoo . ntau tag nrho cheeb tsam ntawm nto ntawm ib qho khoom peb-dimensional. Piv txwv: lub thaj chaw saum npoo ntawm ib lub kub cheeb tsam ntawm tag nrho 6 lub ntsej muag ntxiv ua ke. Saib: Thaj chaw.
Tom qab ntawd, lo lus nug yog, qhov chaw ntawm qhov zoo li cas yog dab tsi?
Cov thaj chaw saum npoo ntawm peb-dimensional puab yog lub sum ntawm tag nrho cov thaj chaw saum npoo ntawm txhua sab. Kuv nyiam xav txog cov puab raws li lub hnub yug tam sim no thiab thaj chaw saum npoo raws li daim ntawv qhwv.
Qhov chaw ntawm daim duab peb sab yog dab tsi?
Cov mis zoo li no: thaj chaw saum npoo = 2(pi x radius squared) + 2(pi x radius x height). Siv cov piv txwv zoo li ua ntej, qhov sib npaug yuav yog: 2(3.14 x 9 x 9) + 2(3.14 x 9 x 20) = 2(254.34) + 2(565.2) = 508.68 + 1, 130.4 = 1, 639.08 squared ntiv tes.
Pom zoo:
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