Video: Dab tsi yog qhov kev xav ntawm daim duab peb sab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Reflection Daim duab peb sab . Cov daim duab peb sab tau los ntawm xav txog cov vertices ntawm kev siv daim duab peb sab hais txog qhov opposite sab yog hu ua daim duab peb sab reflection (Grinberg 2003). Nws yog foundations rau qhov siv daim duab peb sab nrog lub orthocenter ua tus saib, thiab muaj trilinear vertex matrix. (1) Nws sab ntev yog.
Xav txog qhov no, koj xav li cas txog daim duab peb sab hauv Y axis?
Thaum koj xav txog ib point hla lub y - axis , cov y - koom tes tseem zoo li qub, tab sis x- koom tes hloov mus rau hauv nws qhov opposite (nws lub cim yog hloov). Daim ntawv ceeb toom tias B yog 5 kab rov tav units mus rau sab xis ntawm lub y - axis , thiab B' yog 5 kab rov tav units rau sab laug ntawm lub y - axis . tus y - axis yog qhov point (-x, y ).
Ib yam li ntawd, tus qauv rau kev xav ntawm y axis yog dab tsi? Kev xav hauv y - axis : Txoj cai rau a kev xav ntawm y - axis yog (x, y ) →(-x, y ).
Kuj Paub, dab tsi yog qhov kev xav ntawm lub cev?
Kev xav - ntawm ib tug polygon A transformation qhov twg txhua lub ntsiab lus hauv a puab tshwm ntawm qhov sib npaug ntawm qhov sib npaug ntawm sab nraud ntawm ib kab uas tau muab - kab ntawm xav txog.
Yuav ua li cas rau koj nrhiav thaj tsam ntawm daim duab peb sab?
Rau nrhiav tus cheeb tsam ntawm a daim duab peb sab , muab lub hauv paus los ntawm qhov siab, thiab muab faib los ntawm 2. Kev faib los ntawm 2 los ntawm qhov tseeb tias ib qho parallelogram tuaj yeem muab faib ua 2 daim duab peb sab . Piv txwv li, nyob rau hauv daim duab mus rau sab laug, lub cheeb tsam ntawm txhua tus daim duab peb sab yog sib npaug rau ib nrab ntawm cheeb tsam ntawm parallelogram.
Pom zoo:
Dab tsi yog peb seem ntawm daim duab peb sab semantic?
Lub Semantic Daim duab peb sab ntawm lub ntsiab lus muaj peb ntu. Cim npe, siv (xav), thiab xa mus
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
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 qhov txawv ntawm lub xeev daim duab kos duab thiab daim duab ua haujlwm?
Lub xeev daim duab qauv yog siv los qhia qhov sib lawv liag ntawm lub xeev uas ib yam khoom mus dhau, qhov ua rau kev hloov ntawm ib lub xeev mus rau lwm qhov thiab qhov kev txiav txim uas tshwm sim los ntawm lub xeev hloov. Daim duab ua haujlwm yog ntws ntawm kev ua haujlwm yam tsis muaj qhov tshwm sim (kev tshwm sim) mechanism, lub xeev tshuab yog suav nrog lub xeev triggered
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