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Video: Koj pom qhov ntev li cas thaum muab thaj chaw thiab ib puag ncig?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nrhiav Length thiab Dav Thaum Koj Paub Thaj tsam thiab Perimeter
Yog tias koj tshwm sim kom paub qhov kev ncua deb ntawm lub duab plaub, uas yog nws ib puag ncig , koj tuaj yeem daws qhov sib npaug ntawm L thiab W. Thawj qhov sib npaug yog qhov rau cheeb tsam , A = L ⋅ W, thiab qhov thib ob yog rau ib puag ncig , P = 2L + 2W.
Tsis tas li ntawd, koj yuav nrhiav tau qhov perimeter li cas thaum muab thaj chaw?
Perimeter ntawm ib daim duab plaub
- Nco ntsoov cov qauv rau ib puag ncig thiab thaj tsam ntawm ib daim duab plaub. Qhov cheeb tsam ntawm ib daim duab plaub yog a = ntev * dav, thaum lub perimeter yog p = (2 * ntev) + (2 * dav)
- Hloov cov nqi paub rau hauv cov qauv hauv cheeb tsam. 36 = 4x w.
- Hloov cov nqi rau qhov ntev thiab qhov dav rau hauv cov qauv perimeter.
Tsis tas li ntawd, koj yuav ua li cas pom ib sab ntawm lub duab plaub thaum muab rau thaj tsam? Cov cheeb tsam ntawm a duab plaub (A) muaj feem xyuam rau qhov ntev (L) thiab dav (W) ntawm nws sab los ntawm kev sib raug zoo hauv qab no: A = L ⋅ W. Yog koj paub cov dav, nws yooj yim rau nrhiav qhov ntev los ntawm rearranging qhov sib npaug rau tau L = A ÷ W. Yog koj paub cov ntev thiab xav kom dav, rearrange rau tau W = A ÷ L.
Tsis tas li ntawd, koj yuav pom qhov ntev ntawm thaj chaw li cas?
Rau qhov piv txwv no, siv 30 square feet ua tus cheeb tsam , thiab 6 feet raws li qhov dav. Sau cov cheeb tsam equation: A = L * W qhov "A" stands for the cheeb tsam , "L" stands rau qhov ntev thiab "W" stands rau qhov dav ntawm ib daim duab plaub. daws cov cheeb tsam equation: 30 = L * 6. Faib ob sab ntawm qhov sib npaug ntawm 6, thiab sau cov lus teb.
Tus qauv rau thaj tsam ntawm txhua daim duab yog dab tsi?
Thaj tsam ntawm cov qauv dav hlau
| Luas = ½ × b × h b = puag h = ntsug qhov siab | luas = a2 a = length of side |
|---|---|
| Rectangle Area = w × h w = dav h = qhov siab | Parallelogram Area = b × h b = puag h = ntsug qhov siab |
Pom zoo:
Koj pom qhov ntev li cas thaum muab ntim?
Chav ntsuas Volume = ntev x dav x qhov siab. Koj tsuas yog yuav tsum paub ib sab los txheeb xyuas qhov ntim ntawm lub voos xwmfab. Cov ntsuas ntsuas rau ntim yog cubic units. Volume yog nyob rau hauv peb-dimensions. Koj tuaj yeem muab cov sab hauv txhua qhov kev txiav txim. Sab twg koj hu ntev, dav, lossis qhov siab tsis muaj teeb meem
Koj pom qhov arc ntev thiab thaj tsam li cas?
Lub kaum sab xis nruab nrab uas yog subtended los ntawm ib qho loj arc muaj qhov ntsuas loj dua 180 °. Cov mis arc ntev yog siv los nrhiav qhov ntev ntawm qhov arc ntawm lub voj voog; l=rθ l = r θ, qhov twg θ yog nyob rau hauv radians. Sector cheeb tsam pom A = 12θr2 A = 1 2 θ r 2, qhov twg θ yog nyob rau hauv radians
Koj pom thaj tsam thiab ib puag ncig hauv lej li cas?
Cov mis rau ib puag ncig ntawm ib lub duab plaub feem ntau sau li P = 2l + 2w, qhov twg l yog qhov ntev ntawm lub duab plaub thiab w yog qhov dav ntawm lub duab plaub. Qhov cheeb tsam ntawm daim duab ob sab piav qhia txog tus nqi ntawm cov duab npog. Koj ntsuas thaj tsam hauv square units ntawm qhov loj me
Koj pom qhov siab ntawm lub thawv li cas thaum muab qhov chaw saum npoo?
Nrhiav Yam Txog Lub Thawv A lub thawv feem ntau yog tus yam ntxwv ntawm nws qhov siab, thiab nws qhov dav, W, thiab nws qhov ntev L. Qhov dav, qhov siab, thiab qhov ntev ntawm lub thawv tuaj yeem sib txawv. Qhov ntim, lossis qhov chaw nyob hauv lub thawv yog h × W × L. Qhov chaw sab nraud ntawm lub thawv yog 2 (h × W) + 2 (h × L) + 2 (W × L)
Yuav ua li cas koj pom qhov ntev ntawm ib daim duab plaub thaum muab lub perimeter?
Nrhiav Length thiab Dav Thaum Koj Paub Cheeb Tsam thiab Perimeter Yog tias koj tshwm sim kom paub qhov kev ncua deb nyob ib ncig ntawm lub kaum sab xis, uas yog nws qhov perimeter, koj tuaj yeem daws qhov sib npaug ntawm L thiab W. Thawj qhov sib npaug yog rau thaj tsam, A = L ⋅ W, thiab qhov thib ob yog qhov perimeter, P = 2L + 2W