Video: Daim duab peb sab yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Noun. daim duab peb sab m (plural daim duab peb sab ) txoj cai daim duab peb sab (a daim duab peb sab muaj lub kaum sab xis raws li ib qho ntawm nws cov kaum sab hauv)
Yog li ntawd, kev sib raug zoo ntawm daim duab plaub thiab daim duab peb sab yog dab tsi?
Ib txoj cai daim duab peb sab , ib square a duab plaub muaj ib yam nkaus xwb thiab qhov ntawd yog ib lub kaum sab xis yog 90 degrees. Qhov txawv nruab nrab lawv yog: A daim duab peb sab muaj 3 lub ces kaum thaum ib square thiab a duab plaub muaj 4 lub kaum ntse ntse. A daim duab peb sab muaj 3 qhov nruab nrab thaum lub square thiab a duab plaub muaj 2 diagonals txhua.
Kuj Paub, qhov piv txwv duab plaub yog dab tsi? Lub ntsiab txhais ntawm a duab plaub yog plaub-sided daim duab lossis cov duab nrog plaub lub kaum sab xis uas tsis yog square. Ib piv txwv ntawm a duab plaub yog cov duab ntawm ib daim duab 8x10. YourDictionary txhais thiab siv piv txwv.
Ib yam li ntawd ib tug yuav nug, lub duab plaub txhais li cas?
A duab plaub yog ib qho duab nrog plaub sab thiab plaub txoj cai kaum. Lub rect hauv duab plaub los ntawm Latin rectus, uas txhais tau tias "txoj cai" lossis "ncaj." Vim nws cov kaum sab xis, a duab plaub muaj ob sab ncaj.
Lub ntsiab lus ntawm daim duab plaub hauv lej yog dab tsi?
Daim duab plaub . ntau A 4-sided tiaj tus duab nrog ncaj sab uas txhua sab sab hauv yog kaum sab xis (90 °). Tsis tas li ntawd sab nraud yog parallel thiab sib npaug ntev. Piv txwv li: Lub square yog ib hom tshwj xeeb ntawm duab plaub.
Pom zoo:
Dab tsi yog equidistant los ntawm peb sab ntawm daim duab peb sab?
Lub ntsiab lus uas sib npaug rau txhua sab ntawm daim duab peb sab yog hu ua incenter: Ib qho nruab nrab yog ib qho kab uas muaj ib qho ntawm nws qhov kawg ntawm lub vertex ntawm daim duab peb sab thiab lwm qhov kawg ntawm qhov nruab nrab ntawm sab opposite lub vertex. Peb qhov nruab nrab ntawm ib daim duab peb sab sib ntsib hauv centroid
Dab tsi yog lub kaum sab xis ntsuas hauv daim duab peb sab ABC?
Kev piav qhia ib kauj ruam dhau los: Nws tau muab tias ABC yog lub kaum sab xis uas yog kaum sab xis ntawm C thiab AC = 7 ntiv tes thiab CB = 5 ntiv tes. Yog li, qhov ntsuas ntawm cov kaum sab xis uas ploj lawm hauv daim duab peb sab ABC yog 35.5 ° thiab 54.5 ° feem
Koj tuaj yeem ua pov thawj li cas 2 daim duab peb sab zoo sib xws siv lub kaum sab xis sab SAS zoo sib xws postulate?
SAS Similarity Theorem hais tias yog ob sab hauv ib daim duab peb sab yog proportional rau ob sab hauv lwm daim duab peb sab thiab lub kaum sab xis nyob rau hauv ob qho tib si congruent, ces ob daim duab peb sab zoo ib yam. Ib qho kev hloov pauv zoo sib xws yog ib lossis ntau qhov kev hloov pauv tsis tu ncua ua raws li kev dilation
Vim li cas nws thiaj li hais tias lub Orthocenter ntawm daim duab peb sab obtuse yuav tsum nyob rau sab nraud ntawm daim duab peb sab?
Nws hloov tawm tias tag nrho peb qhov siab ib txwm sib tshuam ntawm tib lub ntsiab lus - lub npe hu ua orthocenter ntawm daim duab peb sab. Lub orthocenter tsis yog ib txwm nyob hauv daim duab peb sab. Yog tias daim duab peb sab yog obtuse, nws yuav nyob sab nraud. Txhawm rau ua kom qhov no tshwm sim cov kab qhov siab yuav tsum tau txuas ntxiv kom lawv hla
Dab tsi yog kev sib raug zoo ntawm sab nrauv thiab sab hauv lub kaum sab xis ntawm daim duab peb sab?
Cov kaum sab hauv yog hu ua Sab hauv cov ces kaum. Cov lej ntawm cov kaum sab hauv ntawm daim duab peb sab yog ib txwm 180 degrees. Lub kaum sab nrauv yog lub kaum sab xis ntawm ib sab ntawm ib qho duab, thiab ib txoj kab txuas ntxiv los ntawm sab tom ntej. Qhov sib npaug ntawm lub kaum sab nrauv thiab nws lub kaum sab hauv uas nyob ib sab kuj yog 180 degrees