Lub ib puag ncig yuav ib txwm sib npaug, vim qhov ntev yog muab faib ua 2, ua kom sib npaug, thiab ntxiv rau qhov dav uas tau muab faib ua 2, kuj ua rau nws txawm. Tab sis yog hais tias ob qho tib si qhov ntev thiab qhov dav yog khib, ces cheeb tsam yuav khib, txhais tau hais tias nws yog tsis yooj yim sua rau lub perimeter yuav zoo ib yam li cheeb tsam.
Cov duab puas muaj tib cheeb tsam thiab ib puag ncig?
Ib lub ntsej muag sib npaug (lossis zoo meej) yog ib qho uas nws cheeb tsam yog tus lej sib npaug rau nws thaj tsam. Piv txwv li, ib lub kaum sab xis nrog sab 5, 12 thiab 13 muaj thaj tsam thiab ib puag ncig ob leeg muaj qhov tsis muaj tus lej ntawm 30.
Puas square ib txwm muaj tib cheeb tsam thiab ib puag ncig?
Ib yam rectangle yuav ib txwm muaj ntau ntawm cov blocks nthuav tawm rau sab nraud tshaj li ib square ntawm tib cheeb tsam. Qhov no ua pov thawj tias ib daim duab plaub yuav ib txwm muaj ib cheeb tsam loj dua ib lub square nrog tib cheeb tsam. Qhov no txhais tau hais tias yog ib daim duab plaub thiab ib lub square muaj ib puag ncig, lub duab plaub yuav tsum muaj thaj tsam me dua.
Puas yog ib puag ncig tsawg dua thaj chaw?
Lub cheeb tsam ib txwm loj dua tsuas yog ib qho(Shape G). … Cov cheeb tsam thiab ib puag ncig yog tib yam. Tib yam tshwm sim yog tias koj muaj ib daim duab plaub uas muaj qhov ntev ntawm 6 thiab qhov dav ntawm 3. Table 3 (lawv tsis tau muab lawv lub tsev kawm ntawv) saib ntawm kev nrhiav cov duab uas muaj ib puag ncig tus lej ob zaug hauv cheeb tsam.
Puas perimeter nce nrog cheeb tsam?
Yog tias koj pib nrog cov duab rectilinear, thaum koj nce cheeb tsam, lub perimeter yuav nce.
