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Video: Dab tsi yog qhov ntim ntawm daim duab peb sab prism?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov ntim ntawm a daim duab peb sab prism tuaj yeem nrhiav tau los ntawm kev sib npaug ntawm lub hauv paus lub sij hawm qhov siab. Ob daim duab ntawm lub Daim duab peb sab prisms hauv qab no qhia tib cov qauv. Cov mis, feem ntau, yog thaj tsam ntawm lub hauv paus (daim duab peb sab liab hauv daim duab sab laug) lub sij hawm qhov siab, h.
Ua raws li qhov no hauv kev xav, koj yuav ua li cas thiaj nrhiav tau qhov ntim ntawm daim duab peb sab prism?
Yuav xam cov ntim ntawm ib daim duab peb sab prism , ntsuas qhov dav thiab qhov siab ntawm a daim duab peb sab puag, ces muab lub hauv paus los ntawm qhov siab los ntawm 1/2 mus rau txiav txim tus daim duab peb sab cheeb tsam. Tom ntej no, ntsuas qhov siab ntawm lub daim duab peb sab prism thiab muab qhov no los ntawm cov daim duab peb sab cheeb tsam kom tau qhov ntim.
Koj pom qhov ntim ntawm daim duab peb sab prism Qib 8 li cas? Cov ntim ntawm ib daim duab peb sab prism tuaj yeem nrhiav tau los ntawm kev sib npaug ntawm lub hauv paus lub sij hawm qhov siab. Ob daim duab ntawm lub Daim duab peb sab prisms hauv qab no qhia tib cov qauv. Cov mis, feem ntau, yog thaj tsam ntawm lub hauv paus (liab daim duab peb sab hauv daim duab sab laug) lub sij hawm qhov siab, h.
Ib sab saum toj no, qhov ntim ntawm lub prism yog dab tsi?
Cov mis rau lub ntim ntawm ib prism yog V = Bh, qhov B yog qhov chaw hauv paus thiab h yog qhov siab. Lub hauv paus ntawm prism yog ib daim duab plaub. Qhov ntev ntawm daim duab plaub yog 9 cm thiab qhov dav yog 7 cm.
Kuv yuav xam qhov ntim ntawm prism li cas?
Txoj Kev 3 xam qhov ntim ntawm Rectangular Prism
- Sau cov qauv los nrhiav qhov ntim ntawm ib lub prism. Cov mis tsuas yog V = ntev * dav * qhov siab.
- Nrhiav qhov ntev.
- Nrhiav qhov dav.
- Nrhiav qhov siab.
- Muab qhov ntev, qhov dav, thiab qhov siab.
- Qhia koj cov lus teb hauv cubic units.
Pom zoo:
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
Yuav ua li cas koj pom ob sab ntawm daim duab peb sab prism?
Qhov sib npaug ntawm ob qhov yooj yim tshaj plaws yog: ntim = 0.5 * b * h * ntev, qhov twg b yog qhov ntev ntawm lub hauv paus ntawm daim duab peb sab, h yog qhov siab ntawm daim duab peb sab thiab ntev yog prism ntev. cheeb tsam = ntev * (a + b + c) + (2 * base_area), qhov twg a, b, saib xyuas sab ntawm daim duab peb sab thiab base_area yog thaj tsam peb sab