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Video: Koj pom thaj tsam thiab ib puag ncig hauv lej li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov mis rau lub ib puag ncig ntawm ib daim 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. Cov cheeb tsam ntawm ib daim duab ob-dimensional piav txog tus nqi ntawm cov duab npog. Koj ntsuas cheeb tsam nyob rau hauv square units ntawm ib tug taag loj.
Tsuas yog li ntawd, koj yuav nrhiav tau thaj tsam li cas nrog perimeter?
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.
Kuj Paub, ua li cas koj nrhiav perimeter hauv lej? Cov ib puag ncig yog qhov ntev ntawm cov qauv ntawm cov duab. Yuav nrhiav tau ib puag ncig ntawm ib daim duab plaub lossis square koj yuav tsum ntxiv qhov ntev ntawm tag nrho plaub sab. x yog qhov no qhov ntev ntawm lub duab plaub thaum y yog qhov dav ntawm lub duab plaub. Lub cheeb tsam yog ntsuas qhov saum npoo ntawm ib daim duab.
Yog li ntawd, hom lej twg yog thaj tsam thiab ib puag ncig?
Cov duab tuaj yeem yog ib qho polygon, xws li daim duab peb sab, square, lossis duab plaub. Nws tuaj yeem ua tau ib daim duab curvilinear, zoo li lub voj voog. Thaj chaw yog ib txwm ntsuas nyob rau hauv square units. Perimeter yog qhov kev ncua deb nyob ib ncig ntawm ob-dimensional duab.
Tus qauv rau cheeb tsam yog dab tsi?
Cov qauv hauv cheeb tsam yooj yim tshaj plaws yog cov qauv rau thaj tsam ntawm a duab plaub . Muab ib duab plaub nrog ntev l thiab width w, the formula for area is: A = lw( duab plaub ). Ntawd yog, thaj tsam ntawm lub duab plaub yog cov ntev multiplied los ntawm qhov dav.
Pom zoo:
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
Yuav ua li cas koj pom thaj tsam ntawm daim duab hauv square units?
Thaj tsam yog ntsuas hauv 'square' units. Lub cheeb tsam ntawm daim duab yog tus naj npawb ntawm cov squares yuav tsum tau npog nws tag nrho, zoo li cov vuas rau hauv pem teb. Thaj tsam ntawm ib square = sab sij hawm sab. Txij li txhua sab ntawm ib lub square yog tib yam, nws tuaj yeem tsuas yog qhov ntev ntawm ib sab squared
Koj pom qhov ntev li cas thaum muab thaj chaw thiab ib puag ncig?
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 duab plaub, 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
Dab tsi yog cov lej suav tag nrho cov lej suav lej thiab lej lej?
Cov lej tiag yog feem ntau muab faib ua cov lej tsis sib haum xeeb thiab tsis sib haum xeeb. Cov zauv rational suav nrog tag nrho cov lej thiab feem. Txhua tus lej tsis zoo thiab tag nrho cov lej ua rau cov lej suav. Tag nrho cov lej suav nrog txhua tus lej ntuj thiab xoom
Vim li cas thiaj tseem ceeb rau kev kawm thaj tsam thiab ib puag ncig?
Chav tsev thiab cov ncauj lus ntawm cheeb tsam thiab ib puag ncig yog qhov tseem ceeb rau kev ua lej vim tias lawv yog lub cev ntawm kev ua lej. Lawv yog lub hauv paus rau kev nkag siab lwm yam ntawm geometry xws li ntim thiab lej theorems uas pab peb nkag siab txog algebra, trigonometry, thiab suav lej