Video: Yuav ua li cas koj pom qhov ntev ntawm ib daim duab plaub thaum muab lub perimeter?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
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.
Pom zoo:
Yuav ua li cas koj pom lub kaum sab xis nruab nrab muab qhov chaw thiab lub vojvoog ntawm ib lub sector?
Kev txiav txim siab Central Angle Los ntawm Sector Area (πr2) × (central angle in degrees ÷ 360 degrees) = sector area. Yog hais tias lub hauv paus lub kaum sab xis ntsuas nyob rau hauv radians, lub mis hloov mus ua: sector cheeb tsam = r2 × (central kaum hauv radians ÷ 2). (θ ÷ 360 degree) × πr2. (52.3 ÷ 100π) × 360. (52.3 ÷ 314) × 360
Vim li cas nws thiaj li hais tias lub Orthocenter ntawm daim duab peb sab obtuse yuav tsum nyob rau sab nraud ntawm daim duab peb sab?
Nws hloov tawm tias tag nrho peb qhov siab ib txwm sib tshuam ntawm tib lub ntsiab lus - lub npe hu ua orthocenter ntawm daim duab peb sab. Lub orthocenter tsis yog ib txwm nyob hauv daim duab peb sab. Yog tias daim duab peb sab yog obtuse, nws yuav nyob sab nraud. Txhawm rau ua kom qhov no tshwm sim cov kab qhov siab yuav tsum tau txuas ntxiv kom lawv hla
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)
Dab tsi yog qhov txawv ntawm lub xeev daim duab kos duab thiab daim duab ua haujlwm?
Lub xeev daim duab qauv yog siv los qhia qhov sib lawv liag ntawm lub xeev uas ib yam khoom mus dhau, qhov ua rau kev hloov ntawm ib lub xeev mus rau lwm qhov thiab qhov kev txiav txim uas tshwm sim los ntawm lub xeev hloov. Daim duab ua haujlwm yog ntws ntawm kev ua haujlwm yam tsis muaj qhov tshwm sim (kev tshwm sim) mechanism, lub xeev tshuab yog suav nrog lub xeev triggered
Qhov twg ntawm cov plaub hau plaub hau yog ib txwm plaub hau plaub hau?
square Tsis tas li ntawd nug, qhov ntsuas ntawm ib lub quadrilateral tsis tu ncua yog dab tsi? Yog, sab hauv lub kaum sab xis ntawm txhua lub ces kaum ntawm ib lub quadrilateral tsis tu ncua yog txhua 90 degrees (360 degrees / 4 fab).