Cov txheej txheem:
Video: Dab tsi yog cov yam ntxwv ntawm daim duab plaub?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Daim duab plaub muaj cov khoom nram qab no:
- Tag nrho cov khoom ntawm ib qho parallelogram siv (cov uas tseem ceeb ntawm no yog cov sib npaug sab, cov sab nraud yog sib haum, thiab kab pheeb ces kaum sib npaug).
- Tag nrho cov ces kaum yog kaum sab xis los ntawm txhais .
- Cov diagonals yog congruent.
Yog li ntawd, dab tsi yog 4 yam khoom ntawm ib daim duab plaub?
Ib daim duab plaub, los ntawm kev txhais, muaj tag nrho cov hauv qab no:
- Plaub sab.
- Plaub vertices uas txhua txuas raws nraim ob sab.
- Plaub vertices yuav tsum yog 90 degree kaum.
- Yog li ntawd, sab yuav tsum yog 2 teev ntawm parallel sab.
- Cov sab yuav tsum muaj 2 qhov ntev, txhua qhov sib koom los ntawm 2 sab.
Tom qab, lo lus nug yog, dab tsi yog lub duab plaub? Ib 4-sided flat puab nrog rau sab ncaj qhov chaw sab hauv yog kaum sab xis (90 °). Tsis tas li ntawd opposite side yog parallel thiab sib npaug ntev. Piv txwv li: Lub square yog ib hom tshwj xeeb ntawm duab plaub.
Ib yam li ntawd, koj tuaj yeem nug, tus yam ntxwv ntawm square yog dab tsi?
Diagonals ntawm a square bisect nws cov ces kaum. Opposite sab ntawm ib square yog ob qho tib si parallel thiab sib npaug ntawm qhov ntev. Tag nrho plaub lub kaum sab xis ntawm a square sib npaug. (Txhua qhov yog 360 ° / 4 = 90 °, yog li txhua lub kaum sab xis ntawm a square yog ib txoj cai.)
Dab tsi yog hu ua duab plaub?
A duab plaub yog ib daim duab nrog plaub sab thiab plaub fab. Cov ces kaum yog tag nrho cov ces kaum. Nws ua raws li qhov ntev ntawm ob sab ntawm ob sab ntawm ib leeg yuav tsum sib npaug. Lo lus los ntawm Latin lo lus txhais tias "txoj cai" thiab lub kaum sab xis. duab plaub nrog tag nrho plaub sab sib npaug ntawm qhov ntev yog hu ua ib square.
Pom zoo:
Dab tsi yog peb yam khoom ntawm ib daim duab plaub?
Ib daim duab plaub muaj peb yam khoom: Txhua lub kaum sab xis ntawm lub duab plaub yog 90 ° Cov sab nraud ntawm lub duab plaub yog sib npaug thiab Parallel. Diagonals ntawm ib daim duab plaub bisect ib leeg
Cov kws kos duab hu li cas cov duab thiab cov duab siv los sawv cev rau cov yam ntxwv ntawm lub ntiaj teb nto?
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Qhov twg ntawm cov plaub hau plaub hau yog ib txwm plaub hau plaub hau?
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