Feem ntau, qhov siab ntawm daim duab peb sab sib npaug yog sib npaug rau √3 / 2 npaug ntawm ib sab ntawm daim duab peb sab sib npaug. Qhov cheeb tsam ntawm daim duab peb sab equilateral yog sib npaug rau 1/2√3s / 2s=√3s 2 /4.
Dab tsi yog tus qauv ntawm daim duab peb sab sib npaug?
Hauv ib daim duab peb sab sib npaug, txhua sab sib npaug thiab tag nrho cov kaum sab hauv yog 60 °. Yog li, thaj tsam ntawm daim duab peb sab sib npaug tuaj yeem suav tau yog tias qhov ntev ntawm ib sab paub. Tus qauv los xam cov cheeb tsam ntawm ib daim duab peb sab sib npaug yog muab raws li, Cheeb Tsam ntawm ib qho daim duab peb sab sib npaug=(√3/4) × a2 square units
Puas yog daim duab peb sab sib npaug 180?
Daim duab peb sab Equilateral muaj 3 lub kaum sib npaug. Tag nrho cov sum ntawm sab hauv lub kaum sab xis ntawm daim duab peb sab yog 180 degrees, yog li ntawd, txhua lub kaum sab xis ntawm daim duab peb sab yog 60 degrees.
Yuav ua li cas koj pom thaj tsam ntawm 60 60 60 daim duab peb sab?
txhawm rau nrhiav thaj tsam ntawm ib daim duab peb sab peb tuaj yeem siv qauv 1/2 (pem x qhov siab), uas yog lub hauv paus lub sij hawm qhov siab muab faib los ntawm ob. Nws yog ib qho tseem ceeb kom nco ntsoov txhua sab ntawm daim duab peb sab sib npaug tuaj yeem siv los ua lub hauv paus thaum muab qhov siab.
Yuav ua li cas koj pom thaj tsam ntawm daim duab peb sab nrog tag nrho peb sab?
Thaj tsam ntawm daim duab peb sab yog dab tsi nrog 3 Sab Sib npaug? Yog tias daim duab peb sab muaj 3 sab sib npaug, nws hu ua daim duab peb sab sib npaug. Qhov cheeb tsam ntawm daim duab peb sab sib npaug tuaj yeem suav nrog cov qauv, Area=a 2(√3/4), qhov 'a' yog sab ntawm daim duab peb sab.
