Video: Yuav ua li cas koj xam alternate sab nrauv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nrhiav sab nrauv cov ces kaum, saib nyob rau hauv qhov chaw saum toj no thiab hauv qab cov kab hla. Nrhiav hloov sab nrauv cov ces kaum, saib ntawm qhov chaw sab nraud rau txhua txoj kab hla, ntawm qhov sib txawv ntawm qhov transversal. Peb vam tias koj hais ∠1, ∠2, ∠7, thiab ∠8 yog qhov sab nrauv lub kaum sab xis.
Nyob rau hauv no hais txog, dab tsi yog alternate sab nrauv ces kaum sib npaug?
Zaj Lus Qhia Hloov cov ces kaum sab nrauv yog lub kaum sab xis uas yog nyob rau sab nraud ntawm transversal thiab sab nraum ob kab. Yog hais tias ob kab yog parallel, ces lub theorem qhia rau koj tias tus alternate sab nrauv ces kaum yog congruent rau ib leeg.
Tsis tas li ntawd, lub kaum sab nrauv sab nrauv zoo li cas? Thaum ob kab yog hla los ntawm lwm txoj kab (hu ua Transversal): Alternate Exterior Angles yog ib khub lub kaum sab xis nyob rau sab nraud ntawm txhua ntawm ob kab no tab sis nyob rau sab nraud ntawm transversal. Hauv qhov piv txwv no, cov no yog ob khub ntawm Hloov sab nrauv Angles ib: a h.
Kuj paub, puas lwm cov ces kaum sab nrauv ntxiv txog 180?
Yog hais tias lub transversal txiav hla cov kab sib txuas (cov ntaub ntawv li niaj zaus) ces sab nrauv cov ces kaum yog supplementary ( ntxiv rau 180 °). Yog li hauv daim duab saum toj no, thaum koj txav cov ntsiab lus A lossis B, ob lub kaum sab xis qhia ib txwm ntxiv rau 180 °. Sim nws thiab ntseeg koj tus kheej qhov no yog qhov tseeb.
Puas yog cov kab sib txuas sib txuas?
Yog ob kab sib npaug yog txiav los ntawm ib tug transversal, cov ces kaum sib raug kev sib haum xeeb . Yog ob kab yog txiav los ntawm ib tug transversal thiab cov ces kaum sib raug kev sib haum xeeb , cov kab yog parallel . Sab hauv Angles ntawm Tib Sab ntawm Transversal: Lub npe yog ib qho kev piav qhia ntawm "qhov chaw" ntawm cov ces kaum no.
Pom zoo:
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
Koj ua pov thawj li cas ntawm cov ces kaum sab nrauv ntawm daim duab peb sab yog 360?
Lub kaum sab nrauv ntawm daim duab peb sab yog sib npaug rau qhov sib npaug ntawm cov kaum sab hauv sab nraud. Yog xav paub ntxiv txog qhov no saib Daim duab peb sab sab nraud lub kaum sab xis theorem. Yog tias lub kaum sib npaug raug coj los ntawm txhua qhov vertex, cov ces kaum sab nrauv ib txwm ntxiv rau 360 ° Qhov tseeb, qhov no muaj tseeb rau txhua qhov convex polygon, tsis yog daim duab peb sab
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
Qhov txawv ntawm alternate interior thiab alternate exterior yog dab tsi?
Thaum ob kab hla los ntawm ib qho transversal, lub kaum sab xis ntawm lub kaum sab xis ntawm sab nraud ntawm cov kab yog lwm cov ces kaum sab nrauv. Ib txoj hauv kev los txheeb xyuas cov kaum sab nrauv sab nrauv yog pom tias lawv yog cov kaum sab xis ntawm cov ces kaum sab hauv. Hloov sab nrauv cov ces kaum sib npaug rau ib leeg
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