Cov txheej txheem:
- Yuav ua li cas koj pom thaj tsam ntawm daim duab peb sab nrog 3 sab?
- cheeb tsam daim duab peb sab yog dab tsi?
- Kuv nrhiav thaj chaw li cas?
- Tus qauv ntawm cheeb tsam yog dab tsi?
Video: Yuav ua li cas nrhiav thaj tsam ntawm daim duab peb sab?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
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.
cheeb tsam daim duab peb sab yog dab tsi?
Thaj chaw ntawm daim duab peb sab txhais tau tias tag nrho qhov chaw nyob los ntawm peb sab ntawm daim duab peb sab hauv 2 lub dav hlau. Cov mis mos yooj yim rau thaj tsam ntawm daim duab peb sab yog sib npaug rau ib nrab ntawm cov khoom ntawm nws lub hauv paus thiab qhov siab, piv txwv li, A=1/2 × b × h.
Kuv nrhiav thaj chaw li cas?
Yuav kom pom thaj tsam ntawm ib daim duab plaub, muab nws qhov siab los ntawm nws qhov dav Rau ib lub square koj tsuas yog yuav tsum nrhiav qhov ntev ntawm ib sab (raws li txhua sab yog qhov tib ntev) thiab muab qhov no los ntawm nws tus kheej kom pom thaj chaw. Qhov no yog tib yam hais tias length2 los yog ntev squared.
Tus qauv ntawm 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 thaj tsam yog: A=lw (lub voos xwmfab) … Raws li qhov tshwj xeeb, li l=w hauv rooj plaub ntawm lub square thaj tsam ntawm ib lub square nrog sab ntev s yog muab los ntawm cov mis: A=s2 (square).
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.
Qhov twg yog qhov ntev ntawm lub hypotenuse ntawm daim duab peb sab?
Nyob rau hauv geometry, lub hypotenuse yog qhov ntev tshaj plaws ntawm daim duab peb sab sab xis, sab tawm ntawm lub kaum sab xis. Qhov ntev ntawm lub hypotenuse tuaj yeem pom siv Pythagorean theorem, uas hais tias lub square ntawm qhov ntev ntawm lub hypotenuse sib npaug ntawm cov squares ntawm qhov ntev ntawm ob sab Ntev npaum li cas ntawm qhov hypotenuse ntawm daim duab peb sab 8cm 15cm?
Ntawm lub vertex ntawm daim duab peb sab?
Txhua sab ntawm daim duab peb sab muaj ob qhov kawg thiab qhov kawg ntawm tag nrho peb sab yog qhov sib cuam tshuam ntawm peb lub ntsiab lus sib txawv hauv lub dav hlau los ua daim duab peb sab. Lub peb qhov sib txawv ntawm qhov sib txawv ntawm lawvyog hu ua vertices ntawm daim duab peb sab .
Ntawm yog thaj tsam ntawm daim duab peb sab sib npaug?
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?