Yuav ua li cas koj pom qhov ntev ntawm ib daim duab plaub thaum muab lub perimeter?
Yuav ua li cas koj pom qhov ntev ntawm ib daim duab plaub thaum muab lub perimeter?

Video: Yuav ua li cas koj pom qhov ntev ntawm ib daim duab plaub thaum muab lub perimeter?

Video: Yuav ua li cas koj pom qhov ntev ntawm ib daim duab plaub thaum muab lub perimeter?
Video: Sib Hawm Dhau (Time Passed) Music Video by: Deeda/Dib Xwb 2024, Kaum ib hlis
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Nrhiav Ntev thiab dav Thaum Koj Paub Cheeb Tsam thiab Perimeter

Yog tias koj tshwm sim kom paub qhov kev ncua deb ntawm qhov duab plaub , uas yog nws ib puag ncig , koj tuaj yeem daws qhov sib npaug ntawm L thiab W. Thawj qhov sib npaug yog tias rau cheeb tsam, A = L ⋅ W, thiab qhov thib ob yog qhov ib puag ncig , P = 2L+ 2W.

Ntawm no, yuav ua li cas koj pom qhov ntev thiab qhov dav ntawm ib daim duab plaub thaum muab lub perimeter?

Piav: Yuav nrhiav tau dav , multiply cov ntev uas koj tau ua muab los ntawm 2, thiab rho tawm qhov tshwm sim los ntawm qhov ib puag ncig . Tam sim no koj muaj tag nrho ntev rau qhov seem 2 sab. Tus lej no muab faib los ntawm 2 yog tus dav.

Tsis tas li ntawd, koj yuav pom qhov dav ntawm daim duab plaub li cas yog tias koj paub qhov ib puag ncig? Rau nrhiav qhov dav ntawm ib daim duab plaub , siv tus qauv : Luas = Luas × dav . Tsuas yog ntsaws thearea thiab ntev ntawm lub duab plaub rau hauv qauv andsolve rau dav . Yog tias koj tsis muaj cheeb tsam, koj tuaj yeem ua tau siv tus duab plaub lub perimeter xwb. Hauv cas, koj yuav siv tus qauv : ib puag ncig luas = 2 x luas plus 2 x dav.

Raws li, koj yuav pom qhov ntev ntawm ib daim duab plaub li cas thaum muab qhov chaw?

Thaj chaw yog ntsuas nyob rau hauv square units xws li squareinches, square feet los yog square meters. Yuav nrhiav tau cheeb tsam ntawm a duab plaub , multiply cov ntev ntawm qhov dav. Theformula yog: A = L * W qhov twg A yog tus cheeb tsam ,l yog ntev , W yog qhov dav, thiab * txhais tau tias sib npaug.

Yuav ua li cas koj xam ib cheeb tsam?

Cov ib puag ncig yog qhov ntev ntawm cov qauv ntawm shape. 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 nyob rau hauv rooj plaub no qhov ntev ntawm lub duab plaub thaum y yog qhov dav ntawm lub duab plaub.

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