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Koj pom thaj tsam thiab ib puag ncig hauv lej li cas?
Koj pom thaj tsam thiab ib puag ncig hauv lej li cas?

Video: Koj pom thaj tsam thiab ib puag ncig hauv lej li cas?

Video: Koj pom thaj tsam thiab ib puag ncig hauv lej li cas?
Video: Ntsaim vaj - Muaj poj niam lawm ua tsis tau li cas ( Official MV ) Nkauj tawm tshiab 2020 2024, Kaum ib hlis
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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

  1. 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)
  2. Hloov cov nqi paub rau hauv cov qauv hauv cheeb tsam. 36 = 4x w.
  3. 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.

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