Nrhiav lub cheeb tsam ntawm ib lub square: qauv thiab cov dej num

Hauv daim ntawv tshaj tawm no, peb yuav xav txog yuav ua li cas xam qhov ib puag ncig ntawm ib lub square thiab txheeb xyuas cov piv txwv ntawm kev daws teeb meem.

Perimeter Formula

Los ntawm sab ntev

Perimeter (P) ntawm ib lub square yog sib npaug rau cov lej ntawm qhov ntev ntawm nws sab.

P = ib + a + a + a

Txij li txhua sab ntawm ib lub square yog sib npaug, cov qauv tuaj yeem qhia tau tias yog cov khoom lag luam:

P = 4 ⋅ a

Raws li qhov ntev ntawm kab pheeb ces kaum

Lub perimeter (P) ntawm ib lub square yog sib npaug rau cov khoom ntawm qhov ntev ntawm nws kab pheeb ces kaum thiab tus naj npawb 2√2:

P = d ⋅ 2√2

Cov qauv no ua raws li qhov sib piv ntawm qhov ntev ntawm sab (a) thiab kab pheeb ces kaum (d) ntawm lub square:

d = a√2.

Piv txwv ntawm cov dej num

Txoj Haujlwm 1

Nrhiav ib puag ncig ntawm ib lub square yog tias nws sab yog 6 cm.

Kev txiav txim siab:

Peb siv cov qauv uas tus nqi ntawm sab koom nrog:

P = 6 cm + 6 cm + 6 cm + 6 cm = 4 ⋅ 6 cm = 24 cm.

Txoj Haujlwm 2

Nrhiav ib puag ncig ntawm ib lub square uas nws kab pheeb ces kaum yog √2 saib

1 Kev daws:

Muab rau hauv tus account tus nqi paub rau peb, peb siv tus qauv thib ob:

P = √2 cm ⋅ 2√2 Luas = 4 cm.

2 Kev daws:

Qhia qhov ntev ntawm sab nyob rau hauv cov nqe lus ntawm kab pheeb ces kaum:

ib = d / √2 = √2 cm / √2 Luas = 1 cm.

Tam sim no, siv thawj tus qauv, peb tau txais:

P = 4 ⋅ 1 cm = 4 cm.