Video: Qhov kev hloov pauv twg yog qhov sib npaug ntawm daim duab peb sab mus rau nws tus kheej?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
nqa lub equilateral daim duab peb sab mus rau nws tus kheej . Yog li, cov no yog cov kev xaiv teb cov lus teb kom raug: kev sib hloov ntawm 120 ° counterclockwise. tig 120 ° clockwise.
Ua raws li qhov no, qhov kev hloov pauv dab tsi nqa lub Pentagon mus rau nws tus kheej?
Qhov no yog vim qhov tsis tu ncua pentagon muaj kev sib hloov symmetry, thiab egin{align*}72^circend{align*} yog tus lej tsawg kawg nkaus uas koj tuaj yeem tig lub pentagon nyob rau hauv thiaj li yuav nqa nws rau nws tus kheej.
Ib tug kuj yuav nug, uas transformation yuav nqa ib txwm octagon mus rau nws tus kheej? 1 Tus Kws Teb Ib Octagon muaj 8 sab. Txhawm rau tig lub Octagon rau nws tus kheej , peb yuav tsum tig txhua sab mus rau ib sab uas nyob ib sab. Qhov ntawd yog (1/8)th ntawm lub voj voog puv. Lub voj voog muaj 360 ° thiab (1/8) 360 ° = 45 °.
Yog li, qhov kev hloov pauv twg yuav nqa lub xwmfab rau nws tus kheej?
1) a xav txog dhau ib qho ntawm nws kab pheeb ces kaum 90 ° kev sib hloov clockwise txog nws qhov chaw 30 txog 180 ° kev sib hloov txog ib qho ntawm nws cov vertices a xav txog hla lub perpendicular bisector ntawm ib sab Page 16 Scale factor = duab thawj 1.
Yuav ua li cas hloov pauv daim duab rau nws tus kheej?
Ib daim duab nyob rau hauv lub dav hlau muaj rotational symmetry yog hais tias daim duab yuav mapped rau nws tus kheej los ntawm ib tug kev sib hloov ntawm 0 ° thiab 360 ° txog qhov nruab nrab ntawm daim duab. Daim duab tuaj yeem tig los ntawm keeb kwm thiab daim ntawv qhia mus rau nws tus kheej.
Pom zoo:
Yuav daws qhov tsis sib npaug ntawm cov kab sib npaug thiab cov kab sib npaug sib npaug li cas?
Kev daws qhov tsis sib npaug ntawm qhov sib npaug yog zoo ib yam li kev daws cov kab sib npaug. Qhov sib txawv tseem ceeb yog koj tig lub cim tsis sib xws thaum faib lossis muab faib los ntawm tus lej tsis zoo. Graphing linear inequalities muaj ob peb qhov sib txawv ntxiv. Qhov uas yog qhov ntxoov ntxoo muaj xws li qhov tseem ceeb uas qhov kev tsis sib xws ntawm cov kab tawm muaj tseeb
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 kev hloov pauv twg yuav hloov daim duab A rau hauv daim duab B?
Ob daim duab tau hais tias yuav sib haum xeeb yog tias ib tus tuaj yeem tau txais los ntawm lwm tus los ntawm ib ntu ntawm kev txhais lus, kev xav, thiab kev sib hloov. Cov duab sib xws muaj qhov loj thiab zoo tib yam. Txhawm rau hloov daim duab A rau hauv daim duab B, koj yuav tsum xav txog nws hla y-axis thiab txhais ib chav nyob rau sab laug
Nws puas yuav ua rau pom qhov sib npaug ntawm kab sib npaug mus rau ib kab thiab los ntawm ib qho taw tes ntawm kab?
Qhov sib npaug ntawm ib kab uas yog parallel lossis perpendicular rau ib kab? Cov lus teb tau: Cov nqes hav ntawm cov kab sib npaug sib npaug. Hloov txoj kab nqes paub thiab cov kev sib koom ua ke ntawm ib qho taw tes ntawm lwm txoj kab rau hauv daim ntawv point-slope kom pom qhov sib npaug ntawm kab 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