Perimeter cuam tshuam rau cheeb tsam li cas?
Perimeter cuam tshuam rau cheeb tsam li cas?

Video: Perimeter cuam tshuam rau cheeb tsam li cas?

Video: Perimeter cuam tshuam rau cheeb tsam li cas?
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Tej zaum nws yuav yog qhov ntev ntawm ib sab ntawm lub polygon (ib daim duab nrog ncaj sab) lossis lub vojvoog ntawm lub voj voog. Koj tuaj yeem nrhiav tau ib puag ncig ntawm ib txwm octagon (8-sab daim duab nrog sib npaug sab) los ntawm kev muab qhov ntev ntawm ib sab los ntawm 8. cheeb tsam ntawm ib daim duab yog qhov ntsuas qhov loj npaum li cas nws nto.

Ib yam li ntawd, perimeter cuam tshuam li cas rau cheeb tsam?

Thaj chaw yog ntsuas nyob rau hauv square units. Cov cheeb tsam ntawm daim duab plaub tuaj yeem suav nrog cov qauv hauv qab no: A = l ? w, qhov twg l sawv cev qhov ntev thiab w sawv cev qhov dav. Perimeter yog qhov ntev ntawm tus ciam teb ntawm cov duab. Yog li ntawd, lub ib puag ncig sib 24 units.

Ib sab saum toj no, qhov ntsuas qhov ntsuas cuam tshuam li cas rau thaj tsam ntawm cov duab? Hauv cov ntsiab lus, a ntsuas qhov ntsuas tsuas yog tus lej uas muab qhov loj me ntawm a puab . Yog tias ntsuas qhov ntsuas yog peb, ces tus ib puag ncig ntawm qhov khoom tshiab yuav yog peb npaug ntawm qhov qub ib puag ncig . Thaj tsam ntawm a ntsuas cov khoom yuav muab sib npaug rau cov ntsuas qhov ntsuas squared.

Hais txog qhov no, puas cheeb tsam nce nrog Perimeter?

Cov lus teb luv luv: muab tib yam ib puag ncig , daim duab tsis tu ncua nrog ntau sab yuav npog ntau dua cheeb tsam.

Tus qauv rau cheeb tsam yog dab tsi?

Qhov yooj yim tshaj plaws cheeb tsam formula yog cov qauv rau cov cheeb tsam ntawm ib daim duab plaub. Muab ib daim duab plaub nrog ntev l thiab dav w, lub qauv rau cov cheeb tsam is: A = lw (rectangle). Ntawd yog, lub cheeb tsam ntawm daim duab plaub yog qhov ntev multiplied los ntawm qhov dav.

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