Video: 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?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov SAS Similarity Theorem hais tias yog ob sab hauv ib daim duab peb sab yog proportional rau ob sab hauv lwm qhov daim duab peb sab thiab suav nrog lub kaum sab xis nyob rau hauv ob qho tib si congruent, ces tus ob daim duab peb sab yog zoo sib xws . A zoo sib xws transformation yog ib los yog ntau nruj transformations tom qab dilation.
Ua li no, koj ua li cas qhia tias ob daim duab peb sab zoo sib xws?
AA (Angle-Angle) Yog ob khub ntawm cov ces kaum nyob rau hauv ib khub ntawm daim duab peb sab yog congruent, ces cov daim duab peb sab zoo ib yam . Peb paub qhov no vim yog ob kaum khub yog tib yam, ces tus thib peb khub kuj yuav tsum sib npaug. Thaum peb lub kaum sab xis yog txhua qhov sib npaug, peb khub ntawm sab yuav tsum tau sib npaug.
Ib yam li ntawd, koj tuaj yeem qhia tau li cas yog tias daim duab peb sab sib haum? Ob triangles yog congruent yog tias lawv muaj: raws nraim tib yam peb sab thiab. raws nraim tib lub kaum sab xis.
Muaj tsib txoj hauv kev los nrhiav yog tias ob daim duab peb sab sib dhos: SSS, SAS, ASA, AAS thiab HL.
- SSS (sab, sab, sab)
- SAS (sab, kaum sab xis, sab)
- ASA (lub kaum sab xis, sab, kaum sab xis)
- AAS (lub kaum sab xis, sab, sab)
- HL (hypotenuse, ceg)
Ib tug kuj yuav nug, koj xav tau dab tsi los qhia koj puas ua pov thawj ob daim duab peb sab zoo sib xws los ntawm SAS zoo sib xws theorem?
Koj yuav tsum tau qhia uas ob sab ntawm ib daim duab peb sab yog proportional rau ob sib thooj sab ntawm lwm tus daim duab peb sab , nrog rau cov ces kaum sib raug zoo.
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:
Dab tsi pov thawj siv cov duab ntawm lub dav hlau sib koom ua pov thawj cov khoom geometric?
Cov ntaub ntawv pov thawj uas siv cov duab ntawm lub dav hlau sib koom ua pov thawj geometric zog yog hu ua trigonometric
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
Koj ua pov thawj tias daim duab peb sab zoo li cas?
Yog hais tias ob khub ntawm cov ces kaum sib xws nyob rau hauv ib khub ntawm daim duab peb sab yog congruent, ces daim duab peb sab yog zoo sib xws. Peb paub qhov no vim yog tias ob lub kaum sab xis yog tib yam, ces tus khub thib peb kuj yuav tsum sib npaug. Thaum peb lub kaum sab xis yog txhua qhov sib npaug, peb khub ntawm sab yuav tsum tau sib npaug
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