Cov txheej txheem:
- Dab tsi yog tus qauv ntawm daim duab peb sab sib npaug?
- Puas yog daim duab peb sab sib npaug 180?
- Yuav ua li cas koj pom thaj tsam ntawm 60 60 60 daim duab peb sab?
- Yuav ua li cas koj pom thaj tsam ntawm daim duab peb sab nrog tag nrho peb sab?
Video: Ntawm yog thaj tsam ntawm daim duab peb sab sib npaug?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
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.
Pom zoo:
Puas muaj thaj tsam ntawm daim duab peb sab sib npaug?
Nyob hauv ib daim duab peb sab sib npaug, qhov nruab nrab, lub kaum sab xis thiab qhov siab ntawm txhua sab yog tib yam thiab yog cov kab ntawm symmetry ntawm daim duab peb sab sib npaug. Thaj tsam ntawm daim duab peb sab sib npaug yog √3 a 2 / 4.
Puas yog daim duab peb sab sib npaug yog daim duab peb sab?
No, ib daim duab peb sab tsis tuaj yeem yog daim duab peb sab sib npaug . Puas yog daim duab peb sab sib npaug yog daim duab peb sab txoj cai piav qhia koj cov lus teb? Daim duab peb sab sib npaug tsis tuaj yeem yog daim duab peb sab yogQhov no ua rau kev nkag siab vim tias lub kaum sab xis ntsuas hauv ib daim duab peb sab, tsis yog daim duab peb sab sib npaug, sib npaug 180 degrees.
Nyob rau hauv ib lub kaum sab xis daim duab peb sab r yog sib npaug?
Txoj Kev: Cov qauv rau kev xam qhov ntsuas ntawm lub kaum sab xis ntawm daim duab peb sab tuaj yeem muab tau raws li r=(P + B - H) / 2 Thiab peb paub tias thaj tsam ntawm ib qho lub voj voog yog PIr 2 qhov twg PI=22 / 7 thiab r yog lub vojvoog ntawm lub voj voog.
Yuav ua li cas nrhiav thaj tsam ntawm daim duab peb sab?
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 .
Vim li cas txhua daim duab peb sab sib npaug zoo sib xws?
Similarity. Cov cuab yeej ntawm daim duab peb sab sib npaug suav nrog tias tag nrho lawv cov kaum sib npaug 60 degrees. … Txij li txhua txhua daim duab peb sab sib npaug lub kaum sab xis yog 60 degrees, txhua daim duab peb sab sib npaug zoo ib yam vim qhov AAA Postulate .
