Cov txheej txheem:
- Yuav ua li cas koj pom thaj tsam ntawm daim duab peb sab nrog 3 sab?
- Puas yog 1/2 lub sijhawm qhov siab ua haujlwm rau txhua daim duab peb sab?
- Tus qauv rau cheeb tsam yog dab tsi?
- Kuv tuaj yeem pom thaj tsam ntawm daim duab plaub li cas?
- Yuav Ua Li Cas Pom Ib Cheeb Tsam Ntawm Ib Daim duab peb sab | Xam thaj tsam ntawm daim duab peb sab
2024 Tus sau: Simon Evans | [email protected]. Kawg hloov kho: 2024-01-13 03:51
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:
Thaj tsam ntawm daim duab peb sab thaum muab inradius thiab circumradius?
Formula 2: Cheeb Tsam ntawm daim duab peb sab yog nws qhov inradius, r yog paub Area A=r × s, qhov twg r yog lub vojvoog thiab 's' yog lub semi perimeter . Tus qauv ntawm daim duab peb sab yog dab tsi? Tus qauv rau lub voj voog ntawm daim duab peb sab nrog ob sab ntawm qhov ntev a, b, thiab c yog (abc) / sqrt((a + b + c)(b + c - a)(c + a - b)(a + b - c)), thiab rau ib lub polygon tsis tu ncua nrog n sab ntawm qhov ntev s, nws yog s / (2sin(π / n)) .
Vim li cas daim duab peb sab yog ib daim duab peb sab?
Daim duab peb sab. Daim duab peb sab txoj cai yog daim duab peb sab nrog ib lub kaum sab xis(ib lub kaum sib npaug li 90 °). Sab nraub qaum ntawm lub kaum sab xis (sab ntev tshaj plaws) yog hu ua hypotenuse. Qhov seem ob sab (ob sab uas sib tshuam los txiav txim lub kaum sab xis) yog hu ua ob txhais ceg ntawm txoj cai daim duab peb sab .
Puas yog daim duab qhia chaw thaj chaw loj daim duab qhia chaw?
Nyob rau hauv daim ntawv qhia niaj hnub no, daim ntawv qhia saum toj saud lossis daim ntawv qhia saum toj saud yog hom daim ntawv qhia uas qhia los ntawm nthuav dav dav thiab ntau tus sawv cev ntawm cov yam ntxwv nyem, feem ntau yog siv cov kab sib txuas (cov ntsiab lus txuas ntawm qhov siab sib npaug), tab sis keeb kwm siv ntau txoj hauv kev .
Thaum 2 sab ntawm daim duab peb sab sib npaug?
Ib daim duab peb sab isosceles yog li ntawd muaj ob sab sib npaug thiab ob lub kaum sib npaug. Lub npe muab los ntawm Greek iso (tib yam) thiab skelos (leg). Daim duab peb sab nrog txhua sab sib npaug yog hu ua daim duab peb sab sib npaug, thiab daim duab peb sab uas tsis muaj sab sib npaug yog hu ua daim duab peb sab scalene .
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 qauv A=12bh qhov twg b yog lub hauv paus thiab h yogqhov siab ntawm daim duab peb sab. Piv txwv: Nrhiav thaj tsam 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 .