Cov txheej txheem:
Video: Cov qauv twg rau daim duab peb sab congruence tuaj yeem siv tau?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev txiav txim siab kev sib haum xeeb
- SAS (Side-Angle-Side): Yog ob khub ntawm ob sab ntawm ob daim duab peb sab yog sib npaug ntawm qhov ntev, thiab cov kaum sib npaug sib npaug hauv kev ntsuas, ces tus daim duab peb sab yog kev sib haum xeeb .
- SSS (Side-Side-Side): Yog peb khub ntawm ob sab daim duab peb sab yog sib npaug ntawm qhov ntev, ces tus daim duab peb sab yog kev sib haum xeeb .
Ib yam li ntawd, cov txheej txheem twg rau daim duab peb sab congruence tso cai rau koj tam sim ntawd?
Los ntawm daim duab peb tau txais cov kab nruab nrab yog ib qho rau ob qho no daim duab peb sab . Tom qab ntawd lwm lub ntsiab lus muab yog qhov hypotenuse ntawm ob daim duab peb sab yog kev sib haum xeeb . Los ntawm HL cov txheej txheem rau daim duab peb sab congruence tso cai rau tam sim ntawd xaus tias cov daim duab peb sab yog kev sib haum xeeb.
Ib yam li ntawd, 4 qhov kev xeem ntawm kev sib haum xeeb hauv daim duab peb sab yog dab tsi? SSS , SAS , UA, AAS , thiab HL. Cov kev ntsuam xyuas no piav qhia txog kev sib txuas ntawm ob sab sib koom ua ke thiab / lossis cov kaum sab xis uas siv los txiav txim siab seb ob daim duab peb sab puas sib haum.
Ua raws li qhov no, cov txheej txheem twg rau daim duab peb sab congruence tuaj yeem siv los ua pov thawj ob peb daim duab peb sab hauv qab no yog congruent?
Ob sab ntawm ib daim duab peb sab yog sib npaug rau coj ob sab ntawm lwm yam daim duab peb sab . Ib sab yog muaj nyob rau hauv ob qho tib si daim duab peb sab . Thaum peb sab ntawm ib daim duab peb sab yog sib npaug rau peb sab ntawm lwm yam daim duab peb sab ces cov daim duab peb sab yog kev sib haum xeeb los ntawm SSS postulate. Li no, lub khub ntawm daim duab peb sab yog kev sib haum xeeb los ntawm SSS postulate.
Cov duab peb sab twg yuav tsum sib haum?
Triangles yog congruent yog tias:
- SSS (sab sab sab) Tag nrho peb sab sib txuas yog sib npaug ntawm qhov ntev.
- SAS (sab kaum sab xis) Ib khub ntawm sab sib raug thiab lub kaum sab xis suav sib npaug.
- ASA (lub kaum sab xis)
- AAS (lub kaum sab xis sab)
- HL (hypotenuse ceg ntawm txoj cai daim duab peb sab)
Pom zoo:
Koj puas tuaj yeem siv kev txhaum thiab cos ntawm cov duab peb sab tsis zoo?
Xav txog lwm daim duab peb sab uas tsis yog txoj cai, sau npe raws li qhia nrog sab ntev x thiab y. Peb tuaj yeem muab tau ib txoj cai muaj txiaj ntsig uas tsuas muaj cov haujlwm cosine xwb. Txoj cai ntawm cosines tuaj yeem siv los nrhiav kev ntsuas ntawm lub kaum sab xis lossis ib sab ntawm daim duab peb sab uas tsis yog txoj cai yog peb paub: peb sab thiab tsis muaj kaum
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
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?
Ntiaj Teb Kev Tshawb Fawb - Daim Ntawv Qhia Lub Ntiaj Teb Qhov Nto A B GLOBE Ib puag ncig uas sawv cev rau lub ntiaj teb nto. SCALE Siv los sib piv qhov deb ntawm daim ntawv qhia lossis lub ntiaj teb mus deb ntawm lub ntiaj teb nto. SYMBOLS Ntawm daim duab qhia chaw, cov duab siv los ntawm mapmakers sawv ntsug rau cov yam ntxwv ntawm lub ntiaj teb nto. TSEEM CEEB Ib daim ntawv teev cov cim siv rau ntawm daim ntawv qhia
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