Cov txheej txheem:

Pom thaj tsam ntawm daim duab peb sab li cas?
Pom thaj tsam ntawm daim duab peb sab li cas?
Anonim

Yog li, thaj tsam A ntawm daim duab peb sab yog muab los ntawm formula A=12bh qhov twg b yog lub hauv paus thiab h yog qhov siab ntawm daim duab peb sab Piv txwv: Nrhiav thaj chaw ntawm daim duab peb sab. Thaj tsam A ntawm daim duab peb sab yog muab los ntawm cov qauv A=12bh qhov twg b yog lub hauv paus thiab h yog qhov siab ntawm daim duab peb sab.

Yuav ua li cas koj pom thaj tsam ntawm daim duab peb sab nrog 3 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.

Puas yog 1/2 lub sijhawm qhov siab ua haujlwm rau txhua daim duab peb sab?

Tus qauv rau thaj tsam ntawm daim duab peb sab yog 1 / 2 × puag × qhov siab Cov qauv no tuaj yeem sau tau yooj yim dua li Thaj Chaw= 1 / 2 bh. Tus qauv ntawm Cheeb Tsam=1 / 2 bh ua haujlwm rau txhua daim duab peb sab, tsis hais qhov loj lossis zoo li cas.

Tus qauv rau cheeb tsam yog dab tsi?

Cov qauv cheeb tsam yooj yim tshaj plaws yog cov qauv rau thaj tsam ntawm ib lub duab plaub. Muab ib daim duab plaub nrog qhov ntev l thiab qhov dav w, tus qauv rau cheeb tsam yog: A=lw (rectangle). Ntawd yog, thaj tsam ntawm daim duab plaub yog qhov ntev muab faib ua qhov dav.

Kuv tuaj yeem pom thaj tsam ntawm daim duab plaub li cas?

Yuav kom pom thaj tsam ntawm daim duab plaub, peb muab qhov ntev ntawm lub duab plaub los ntawm qhov dav ntawm lub duab plaub.

Pom zoo: